Signs of placental separation are critical knowledge for midwives. The question describes Küstner's sign:

• When the suprapubic area is pressed, if the cord does not retract back = placenta has separated.

However, the combination described — firm/globular uterus + cord lengthening + uterus rising — collectively represents classic signs of placental separation. Among the options:

• Küstner's sign: Cord does not retract when suprapubic pressure applied = separated.
• Calkin's sign: Uterus becomes firm, globular, and rises above umbilicus.
• Schultze mechanism: Placenta separates centrally (fetal surface first) — more common (~80%).
• Duncan mechanism: Separates from edges first — maternal surface presents first.

The specific sign of cord lengthening + uterine globular rise together is Küstner's sign as the primary distinguishing clinical sign taught in Pakistani nursing exams.