Assertion (A): Surgical methods prevent conception
Reason (R): Surgical intervention blocks gamete production and transport

The correct option is A Both A and R are correct and R is the correct explanation of A
Surgical methods prevent conception. The different surgical methods are:

• Tubectomy
• Vasectomy
• Orchiectomy
• Oophorectomy

a) Tubectomy: Tubectomy is a sterilisation procedure in women. In this process the fallopian tube of the female is cut and tied. This blocks the transportation of ovum from the ovaries to the uterus, thereby eliminating any chances of a pregnancy.

b) Vasectomy: In this process, the vas deferens of the male is cut and tied. This blocks the pathway of the sperms and therefore the sperms are unable to reach the urethra via the ejaculatory duct.

c) Orchiectomy: In this process, one or both testicles are surgically removed.

d) Oophorectomy: In this process, one or both ovaries are surgically removed.

Hence, surgical intervention blocks gamete production and transport thereby, preventing conception.

Therefore, Both A and R are correct and R is the correct explanation of A.