$A=\left[\begin{array}{ll}3 & 0 \\0 & 3\end{array}\right]$ হলে $A^{-1}$ নিচের কোনটি?

$\left[\begin{array}{ll}\frac{1}{3} & 0 \\0 & \frac{1}{3}\end{array}\right]$

$\left[\begin{array}{cc}\frac{1}{3} & 0 \\0 & -\frac{1}{3}\end{array}\right]$

$\left[\begin{array}{cc}\frac{-1}{3} & 0 \\0 & \frac{1}{3}\end{array}\right]$

$\left[\begin{array}{rr}-\frac{1}{3} & 0 \\0 & -\frac{1}{3}\end{array}\right]$