Decide Whether or Not Matrix a and Matrix B Are

Multiple Choice

Decide whether or not matrix A and matrix B are inverses.
- $$\mathrm { A } = \left[ \begin{array} { r r } - 2 & 4 \\4 & - 4\end{array} \right] \text { and } \mathrm { B } = \left[ \begin{array} { l l } 1 / 2 & 1 / 4 \\1 / 2 & 1 / 4\end{array} \right]$$

A) Yes
B) No