Answer:
In barrier methods, ovum and sperms are prevented from physically meeting with the help of barriers.
(a) Condoms are barriers made of thin rubber/latex sheath that are used to cover penis in the male or vagina and cervix in the female, just before coitus. Nirodh is a popular brand of condom for the male.
(b) 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.
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