[A] : Spermatogenesis occurs in the seminiferous tubules of the testes which also produce testosterone in interstitial cells.
[R]: Testosterone maintains the secondary sex characteristics of males, such as low voice, facial hair and increased muscle strength.
A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false