Which one of these is not an accessory gland in the male reproductive system?

The glans penis is covered by which of the following?

Where are the testes located in most premature infants?

Which duct is formed by the union of the vasa efferentia and the seminiferous tubules?

The prostate gland surrounds the $A$. It produces a milky, slightly alkaline solution which forms $B$ volume of the semen. The secretion contains $C$ acid and enzymes (acid phosphatases, amylase, pepsinogen, and prostaglandins). $A$, $B$, and $C$ in the above statement are:

Select the correct option for Leydig cells.