Find AB, If Possible $A = \left[ \begin{array} { c c } 2 & - 1 \\ 6 & 5 \end{array} \right]$

Multiple Choice

Find AB, if possible.
- $A = \left[ \begin{array} { c c } 2 & - 1 \\ 6 & 5 \end{array} \right]$ and $B = \left[ \begin{array} { l l } 6 & 2 \\ 1 & 6 \end{array} \right]$

A) Not possible

B) $\left[ \begin{array} { c c } 12 & - 2 \\ 6 & 30 \end{array} \right]$

C) $\left[ \begin{array} { l l } - 2 & 12 \\ 30 & 6 \end{array} \right]$

D) $\left[ \begin{array} { l l } 11 & - 2 \\ 4 & 42 \end{array} \right]$