Releasing of sperms from seminiferous tubules is called

The reproductive cycle in the female primate monkeys, apes and human beings is called

Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled $A, B, C, D.$

Which of the following develops from ectoderm

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

$A \quad B\quad C \quad D$