Which of the following options correctly matches the name of the hormone to its site of production in the human body ?

The correct option is P-iii, Q-iv, R-i, S-ii.

Let's analyze the hormones and their corresponding sites of production shown in the image step-by-step:
1. Oxytocin (P): Oxytocin is synthesized in the hypothalamus of the brain and stored in and released from the posterior lobe of the Pituitary Gland (iii). Therefore, P matches with iii.
2. Relaxin (Q): Relaxin is a hormone that is primarily secreted by the corpus luteum in the Ovaries (iv) (and also by the placenta during pregnancy) to help prepare the body for childbirth by relaxing ligaments in the pelvis. Therefore, Q matches with iv.
3. hCG (Human Chorionic Gonadotropin) (R): hCG is a hormone produced specifically during pregnancy by the developing cells of the Placenta (i) shortly after implantation. Therefore, R matches with i.
4. Progesterone (S): Progesterone is a steroid hormone produced mainly by the Corpus Luteum (ii) in the ovary following ovulation, which plays a crucial role in maintaining pregnancy. Therefore, S matches with ii.

Combining these matches, we get:
• P → iii
• Q → iv
• R → i
• S → ii

Thus, the correct matching option is P-iii, Q-iv, R-i, S-ii.