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It is expressed per 1,000 live births. U5MR is a key indicator of child health and overall development. Pakistan's U5MR is approximately 67–70 per 1,000 live births. The leading causes include pneumonia, diarrhea, malnutrition, and neonatal complications — all areas where community health nursing interventions are critical.

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MBBS QUESTION #10282

Question 2285

On tuning fork testing, a patient's Rinne test shows bone conduction perceived louder/longer than air conduction (a 'negative' Rinne) in the affected ear, and the Weber test lateralizes to that same affected ear. This pattern indicates:

Conductive hearing loss in the affected ear✔️
Sensorineural hearing loss in the affected ear
Entirely normal hearing bilaterally
Sensorineural hearing loss in the opposite (unaffected) ear

Correct Answer Logic:

Normally air conduction exceeds bone conduction (positive Rinne). A negative Rinne (bone > air) indicates impaired sound transmission through the external/middle ear — conductive hearing loss — and in conductive loss the Weber test lateralizes toward (is heard louder in) the affected ear, since ambient masking noise is reduced there.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3420

Question 2286

'Enzymatic Inhibition' where the inhibitor binds to a site OTHER than the active site is:

Competitive
Non-competitive (Allosteric)✔️
Irreversible
Active

Correct Answer Logic:

This changes the enzyme's shape so the substrate can no longer fit.

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English QUESTION #11605

Question 2287

I have known her _____ three days.

from
since
for✔️
None of these

Correct Answer Logic:

For is correct when expressing a duration of time with the present perfect tense: “I have known her for three days.” Since is used with a specific point in time (e.g., “since Monday”), not a duration. From is used for start points in different tense constructions (e.g., “from 9 to 5”) but not with the present perfect alone.

Correct Answer: C — for.

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Statistics QUESTION #2008

Question 2288

In a Randomized Complete Block (RCB) design with $b = 9$ blocks and $t = 4$ treatments, the error degrees of freedom is:

35
32
24✔️
27

Correct Answer Logic:

Error df in RCBD $= (b-1)(t-1) = (9-1)(4-1) = 8 \times 3 = 24$. Equivalently, total df $= bt - 1 = 35$, blocks df $= b - 1 = 8$, treatments df $= t - 1 = 3$, so error df $= 35 - 8 - 3 = 24$.

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Agronomy QUESTION #2031

Question 2289

The most significant agronomic advantage of including a legume crop in a rotation sequence is:

It produces allelopathic compounds that suppress all subsequent weeds
It fixes atmospheric nitrogen through symbiosis with Rhizobium bacteria, reducing nitrogen fertilizer requirement for the subsequent crop✔️
It always produces higher economic yield than cereal crops
It prevents all fungal diseases in the subsequent cereal crop

Correct Answer Logic:

Legumes host Rhizobium or Bradyrhizobium bacteria in root nodules that fix atmospheric $N_2$ into plant-available $NH_4^+$. The residual nitrogen from legume roots and residues (typically 50–200 kg N/ha depending on species) benefits the following crop, reducing synthetic N fertilizer needs.

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General Ability and Fire Fighting QUESTION #5633

Question 2290

Which agent is recommended for a fire involving magnesium shavings in a machine shop?

Water
Wet Chemical
CO2
Specialized Dry Powder✔️

Correct Answer Logic:

Magnesium is a combustible metal (Class D fire). Water reacts violently with burning magnesium. Only specialized dry powder agents designed for Class D fires should be used.

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Planning QUESTION #4945

Question 2291

What is the primary function of a buffer zone in land use planning?

To increase development density
To separate incompatible land uses✔️
To maximize land utilization
To reduce planning costs

Correct Answer Logic:

Buffer zones (green belts, transitional uses) separate incompatible land uses (like industrial from residential) to minimize conflicts, reduce negative impacts, and improve quality of life.

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Chemistry QUESTION #7504

Question 2292

What is the correct IUPAC name of the organic compound with structure: two methyl groups on C1 of a double bond (C1=C2), with a hydrogen on C2, and a bromo-methyl group on C3?
(The compound is: $\text{CH}_3\text{C(CH}_3\text{)=CHCH(Br)CH}_3$, i.e., a five-carbon chain with a double bond and bromine substituent)

3-Bromo-1,2-dimethylbut-1-ene
3-Bromo-3-methyl-1,2-dimethylprop-1-ene
2-Bromo-3-methylpent-3-ene
4-Bromo-3-methylpent-2-ene✔️

Correct Answer Logic:

Identify the longest chain containing the double bond: 5 carbons (pent), with double bond at C2 (pent-2-ene).

Number from the end that gives the double bond the lower locant. A methyl group appears at C3 and Br at C4.

IUPAC name: 4-Bromo-3-methylpent-2-ene

This is a 5-carbon chain ($n = 5$: pent) with double bond at position 2 (C2=C3), methyl at C3, and Br at C4.

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Math Physics Chemistry Biology QUESTION #7767

Question 2293

The physical appearance or observable characteristic of an organism is called its:

Allele
Genetic code
Genotype
Trait✔️

Correct Answer Logic:

Trait (or phenotype) is the physical expression (e.g., tall, dwarf). Genotype is the genetic makeup; allele is a variant form; genetic code is the triplet codon system.

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Chemistry QUESTION #7516

Question 2294

How many litres of water must be added to 1 litre of a pH 1 HCl solution to raise the pH to 2?

0.1 L
0.9 L
2.0 L
9.0 L✔️

Correct Answer Logic:

pH 1 means $[\text{H}^+] = 0.1\ \text{M}$; pH 2 means $[\text{H}^+] = 0.01\ \text{M}$.

Using dilution formula $C_1V_1 = C_2V_2$:

$0.1 \times 1 = 0.01 \times V_2$

$V_2 = 10\ \text{L}$

Volume of water to add $= V_2 - V_1 = 10 - 1 = \mathbf{9.0\ \text{L}}$

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Physics QUESTION #7339

Question 2295

A projectile is fired at $45°$ to the horizontal. The elevation angle of the projectile at its highest point, as seen from the point of projection, is:

$45°$
$60°$
$\tan^{-1}\!\left(\dfrac{1}{2}\right)$✔️
$\tan^{-1}\!\left(\dfrac{\sqrt{3}}{2}\right)$

Correct Answer Logic:

At max height $H = \dfrac{u^2}{4g}$; horizontal distance $= \dfrac{R}{2} = \dfrac{u^2}{2g}$

Elevation angle: $\tan\phi = \dfrac{H}{R/2} = \dfrac{u^2/(4g)}{u^2/(2g)} = \dfrac{1}{2}$

$\phi = \mathbf{\tan^{-1}\!\left(\dfrac{1}{2}\right)}$

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Math Physics Chemistry Biology QUESTION #4176

Question 2296

A mutation prevents proper disulphide bond formation in a fibrous protein, causing brittle nails and slow hair growth. Which of the following proteinaceous substance would be affected?

Elastin
Actin
Keratin✔️
Collagen

Correct Answer Logic:

Keratin contains disulphide bonds that give strength to hair and nails.

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Physics QUESTION #7082

Question 2297

If a man's linear dimensions increase by a factor of $9$ while his density remains constant, by what factor will the stress in his leg change?

$\frac{1}{81}$
9✔️
$\frac{1}{9}$
81

Correct Answer Logic:

Stress is defined as $\frac{\text{Force}}{\text{Area}}$.

Force (Weight) $\propto \text{Volume} \propto L^3$
Area $\propto L^2$
$\text{Stress} \propto \frac{L^3}{L^2} \propto L$
Since $L$ increases by factor $9$, stress increases by factor $9$.

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CISA QUESTION #6840

Question 2298

Define problem
Collect data
Analyze data
Draw conclusions

An organization's audit methodology skips directly from problem definition to conclusions without data collection or analysis. What is the PRIMARY consequence?

Faster audit completion
Conclusions lack evidentiary support and are essentially opinions rather than audit findings✔️
Reduced audit costs
Increased efficiency

Correct Answer Logic:

The scientific method and audit methodology require evidence-based conclusions. Skipping data collection and analysis means conclusions are based on assumptions or opinions rather than facts. This violates the fundamental audit principle that findings must be supported by sufficient, relevant, and reliable evidence.

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