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

• A
  $p$ - Oogonia,$q$ - Primary oocyte,$r$ - Secondary oocyte,$s$ - Ovum
• B
  $p$ - Ovum,$q$ - Oogonia,$r$ - Primary oocyte,$s$ - Secondary oocyte
• C
  $p$ - Secondary oocyte,$q$ - Primary oocyte,$r$ - Ovum,$s$ - Oogonia
• D
  $p$ - Ovum,$q$ - Secondary oocyte,$r$ - Primary oocyte,$s$ - Ovum