The total number of chiral compound/s from the following is

 

 

The graph which represents the following reaction is:

${\left({\mathrm{C}}_6{\mathrm{H}}_5\right)}_3\mathrm{C}-\mathrm{Cl}\frac{{\mathrm{OH}}^{-}}{\mathrm{Pyridine}}{\left({\mathrm{C}}_6{\mathrm{H}}_5\right)}_3\mathrm{C}-\mathrm{OH}$

Testosterone, which is a steroidal hormone, has the following structure.

The total number of asymmetric carbon atom/s in testosterone is ____________.