Match List - I with List - II.

	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 the fallopian tube

Choose the correct answer from the options given below.

The correct option is a-(i), b-(iii), c-(ii), d-(iv).

Let's analyze each contraceptive method listed in List-I and match it with its correct mode of action or description from List-II:

(a) Vaults: Vaults are hemispherical dome-like rubber barriers inserted into the female reproductive tract to cover the cervix during coitus. They physically prevent the entry of sperms into the cervix, thereby preventing fertilization. Thus, (a) matches with (i) (Entry of sperm through Cervix is blocked).

(b) IUDs (Intrauterine Devices): IUDs are devices inserted by doctors into the uterus through the vagina. In India, they are one of the most widely accepted methods of contraception. A key mechanism of IUDs is that they increase phagocytosis of sperms within the uterus (and copper-releasing IUDs also suppress sperm motility and fertilizing capacity). Thus, (b) matches with (iii) (Phagocytosis of sperms within the Uterus).

(c) Vasectomy: Vasectomy is a surgical method of sterilization in males where a small part of the vas deferens is removed or tied up through a small incision on the scrotum. This prevents the transport of sperm. Thus, (c) matches with (ii) (Removal of Vas deferens).

(d) Tubectomy: Tubectomy is a surgical sterilization method in females where a small part of the fallopian tube is removed or tied up through a small incision in the abdomen or through the vagina. This blocks gamete transport. Thus, (d) matches with (iv) (Removal of the fallopian tube).

Matching the evaluations:
a - (i)
b - (iii)
c - (ii)
d - (iv)