Determine Whether Matrix B Is the Inverse of Matrix a by Finding

Multiple Choice

Determine whether matrix B is the inverse of matrix A by finding the product AB.
- $$A = \left[ \begin{array} { r r } - 5 & - 1 \\6 & 0\end{array} \right] , B = \left[ \begin{array} { c c } 0 & \frac { 1 } { 6 } \\- 1 & \frac { 5 } { 6 }\end{array} \right]$$

A) $B \neq A ^ { - 1 }$
B) $B = A ^ { - 1 }$