Answer: Formation of sperm
Step-by-step explanation:
Testosterone is androgen in the testis which is responsible for the process of spermatogenesis. It can be defined as the process by which the sperm formation takes place.
Testosterone is the primary male sex hormone which also helps in the promotion of secondary sexual characters in male.
In the absence of this hormone the process of spermatogenesis rarely progress beyond meiosis.
Hence, the correct answer is option C