Q. Assertion (A) Barrier methods prevent conception.
Reason (R) These prevent the physical meeting of sperm and ova.

 515  163 Reproductive Health Report Error

Solution:

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion. Barrier methods prevent conception because they do not allow the ovum and sperms to physically meet, thereby preventing fertilisation, e.g. condoms, diaphragms, etc.