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

$\left[\begin{array}{rr}1 & 1 \\-2 & -3\end{array}\right]$

$\left[\begin{array}{rr}-1 & -1 \\2 & 3\end{array}\right]$

$\left[\begin{array}{ll}3 & -1 \\2 & -1\end{array}\right]$

$\left[\begin{array}{ll}-1 & 1 \\-2 & 3\end{array}\right]$