ASSERTION: Diaphragms, cervical caps and vaults are barriers made of rubber.
REASON: Diaphragms, cervical caps, and vaults are inserted into the male reproductive tract during coitus.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.

Hint:There are various barrier birth control methods available for both male and female. The barriers are condoms, cervical caps, diaphragms, and vaults. The barrier method of contraception prevents the meeting of the gametes (ova and sperm).

Complete answer:
Birth control which is also called fertility control or contraception can
be defined as a method or device which is used to prevent pregnancy. There are various methods by
which birth control can be prevented. They include hormonal injection or oral consumption of hormones, barrier, intrauterine device, sterilization, and dual protection. The devices which attempt to
prevent the pregnancy by physically preventing sperm from entering into the uterus are called barrier
contraceptives. In males, it is a condom and in females, it includes female condoms, cervical caps,
diaphragm, and contraceptive sponges with spermicide. These barriers made up of rubber are inserted
into the female reproductive tract to cover the cervix during intercourse and prevent pregnancy in females. The fertility is controlled by preventing the entry of sperms through the cervix.
Hence, Option C is the right answer
The above contraceptives are inserted into the female reproductive tract and not the male reproductive tract. In males the contraceptive used as a barrier made up of rubber is condoms.

Note: There are many side effects of using contraceptives which should be taken care of. Continuous use of these contraceptives lead allergic reactions and adverse side effects leads to toxic shock syndrome.