Match List-I with List-II and choose the correct answer from the options given below.

List - I	List - II
(a) Vaults	(i) Entry of sperm through Cervix is blocked
(b) IUDs	(ii) Removal of Vas deferens
(c) Vasectomy	(iii) Phagocytosis of sperms within the Uterus
(d) Tubectomy	(iv) Removal of fallopian tube

We match each contraceptive method in List‑I with the physiological effect described in List‑II.

1. Vaults – These are devices placed in the female reproductive tract that block the entry of sperm through the cervix. Hence they correspond to (i) Entry of sperm through Cervix is blocked.

2. IUDs (Intra‑uterine devices) – IUDs create an intra‑uterine environment that leads to the phagocytosis (destruction) of sperm within the uterus. Therefore they match (iii) Phagocytosis of sperms within the Uterus.

3. Vasectomy – This surgical procedure involves removal of the vas deferens, preventing sperm transport. It matches (ii) Removal of Vas deferens.

4. Tubectomy – Also known as tubal ligation, it entails removal (or occlusion) of the fallopian tube, so it aligns with (iv) Removal of fallopian tube.

Combining these matches gives the final answer: a - i, b - iii, c - ii, d - iv.