Which of the following phases in the development of a sperm has no counterpart in the development of an ovum?

Arrange the following cell layers/structures around the female gamete, from outer to inner side :
$A$. Zona pellucida
$B$. Perivitelline space
$C$. Corona radiata
$D$. Plasma membrane of ovum

$.....P.....$ undergo meiosis to form sperms. $.....Q.....$ provide nutrition to the germ cells.
Choose the correct option for $P$ and $Q$.
$\quad\quad\quad\quad P \quad\quad\quad Q$

Which of the following regulates spermatogenesis?

Define spermiogenesis and spermiation.

Which of the following hormones is secreted in a high amount,causing ovulation in women?