# 1. Spermatogenesis starts at the age of puberty due to significant increase in the secretion of gonadotropin releasing hormone (GnRH). 2. GnRH is a pituitary hormone.

( a ) 1 is correct but 2 is incorrect
( b ) Both are correct
( c ) 1 is incorrect but 2 is correct
( d ) Both are incorrect

Spermatogenesis starts at the age of puberty due to significant increase in the secretion of gonadotropin releasing hormone (GnRH); which is a hypothalamic hormone.