Which one of the following is not a method of contraception in female…

The correct answer is Option (3) → Vasectomy

Option (1) Diaphragms — A method of contraception in females. A diaphragm is a rubber barrier placed in the female reproductive tract to cover the cervix during coitus. It stops sperms from entering through the cervix, and it can be used again.

Option (2) Vaults — A method of contraception in females. A vault is another rubber barrier of the same kind. It also covers the cervix and blocks the entry of sperms.

Option (3) Vasectomy — Not a method of contraception in females. Vasectomy is a surgical method for the male. A small part of the vas deferens, the duct that carries sperms, is removed or tied up through a small cut on the scrotum. A female has no vas deferens.

Option (4) Cervical caps — A method of contraception in females. A cervical cap is a rubber barrier that fits over the cervix. Like diaphragms and vaults, it keeps the sperms out of the uterus.

Note: A similar question was also asked in CUET (UG) 2024 on 15-05-2024 (Slot 1).

NCERT Extract:
Population Stabilisation and Birth Control – “… Surgical methods, also called sterilisation, are generally advised for the male/female partner as a terminal method to prevent any more pregnancies. Surgical intervention blocks gamete transport and thereby prevent conception. Sterilisation procedure in the male is called ‘vasectomy’ and that in the female, ‘tubectomy’.”
Population Stabilisation and Birth Control – “… Diaphragms, cervical caps and vaults are also barriers made of rubber that are inserted into the female reproductive tract to cover the cervix during coitus. They prevent conception by blocking the entry of sperms through the cervix.”