Corona radiata is made up of

Identify the cells represented as $\mathrm{P},\mathrm{Q},\mathrm{R}$ and $\mathrm{S}$ in the given schematic representation of spermatogenesis.

In the given diagram of human sperm, identify the functions of the labelled parts. $\mathrm{a}, \mathrm{b}$ and $\mathrm{c}.$

Identify the cells represented as $\mathrm{p},\mathrm{q},\mathrm{r}$ and $\mathrm{s}$ in the schematic representation of Oogenesis, shown below and choose the correct option.

Study the following

Among the above, correct combination are

What is the correct sequence of sperm formation ?