Match List - I with List - II.

A-IV, B-III, C-II, D-I

The correct answer is Option (4):  A-IV, B-III, C-II, D-I

A. FSH (Follicle-Stimulating Hormone) - IV. Pituitary

• FSH is a hormone secreted by the pituitary gland. It plays a crucial role in the development of ovarian follicles and the regulation of the female reproductive system.

B. Relaxin - III. Ovary

• In the later phase of pregnancy, a hormone called relaxin is also secreted by the ovary. hCG, hPL and relaxin are produced in women only during pregnancy.

C. hCG (Human Chorionic Gonadotropin) and hPL (Human Placental Lactogen) - II. Placenta

• Both hCG and hPL are hormones produced by the placenta during pregnancy.Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogen etc.

D. Progesterone - I. Corpus luteum

• The ovulation (ovulatory phase) is followed by the luteal phase during which the remaining parts of the Graafian follicle transform as the corpus luteum. The corpus luteum secretes large amounts of progesterone which is essential for maintenance of the endometrium.
  Such an endometrium is necessary for implantation of the fertilised ovum and other events of pregnancy.