Which layer of the uterus exhibits strong contraction during delivery…

The correct answer is Option (1) → Myometrium

The wall of the uterus has three layers. The outer layer is the thin, membranous perimetrium, the middle layer is the thick muscular myometrium, and the inner layer is the glandular endometrium.

Option (1) Myometrium — Correct. The myometrium is a thick layer of smooth muscle. It exhibits strong contraction during delivery of the baby.

Option (2) Perimetrium — Incorrect. The perimetrium is the external thin membranous layer of the uterus. It is not the muscle layer that contracts.

Option (3) Endometrium — Incorrect. The endometrium is the inner glandular layer that lines the uterine cavity. It undergoes cyclical changes during the menstrual cycle.

NCERT Extract:
The Female Reproductive System – “… The wall of the uterus has three layers of tissue. The external thin membranous perimetrium, middle thick layer of smooth muscle, myometrium and inner glandular layer called endometrium that lines the uterine cavity. The endometrium undergoes cyclical changes during menstrual cycle while the myometrium exhibits strong contraction during delivery of the baby.”