Where are the testes located in most premature infants?

Given below are two statements:
Statement-$I$: The scrotum helps in maintaining the low temperature of the testes.
Statement-$II$: Low temperature,compared to the normal internal body temperature,is necessary for spermatogenesis.
In the light of the above statements,choose the most appropriate answer from the options given below.

Study the flow chart. Name the hormones labelled as $A, B, C, D$ at each stage.
$A \quad B \quad C \quad D$

The high levels of testosterone in the blood would inhibit:

Which cells in the testis secrete testosterone?

Seminal plasma in human males is rich in