$P=\left[\begin{array}{rr}2 & 1 \\3 & -5\end{array}\right]$ হলে $\mathrm {P}^{2}=$ কত?

$\left[\begin{array}{rr}4 & 1 \\9 & 25\end{array}\right]$

$\left[\begin{array}{rr}4 & 2 \\6 & -10\end{array}\right]$

$\left[\begin{array}{rr}7 & -3 \\-9 & 28\end{array}\right]$

$\left[\begin{array}{rr}7 & -3 \\-9 & -16\end{array}\right]$