Ejaculation of semen is controlled by which system?

Given below is a diagram of the $T.S.$ of a testis. Select the option which gives the correct identification of the function of cells labeled $A, B, C,$ and $D$ from the options given below.
$A$ - cells undergo spermatogenesis to produce spermatozoa.
$B$ - cell responsible for the development of male secondary sexual characters.
$C$ - heads of sperms remain attached to these cells.
$D$ - haploid male gamete.

The high levels of testosterone in the blood would inhibit:

Where are Sertoli cells found?

Which of the following is the primary sex organ in males?

Identify the odd one out.