Sertoli cells are found in:

Each seminiferous tubule is lined on its inside by two types of cells $A$ and $B$. Which of the following options is correct,w.r.t. the type of cell and its function?

$A$

$B$

In humans, the testes are located outside the abdominal cavity within the scrotum. What is the purpose of this arrangement?

$A$: The male urethra is longer than the female urethra.
$R$: It carries both urine as well as semen.

In the urinogenital system of a rabbit, which of the following is present in the male but absent in the female?

From where does the tunica vaginalis of the testis develop?