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

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

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

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

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