Secretions from which one of the following are rich in fructose,calcium and some enzymes?

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.

Which of the following is similar in function to Cowper's gland?

The high levels of testosterone in the blood would inhibit:

What is/are the function$(s)$ of seminal fluid?

What are the width and length of the testis,respectively?