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Let \( A=\left[\begin{array}{rr}1 & 2 \\ 3 & -5\end{array}\right] \) and \( B=\left[\begin{array}{ll}1 & 0 \\ 0 & 2\end{array}\right] \) and \( X \) be a matrix such that \( A=B X \), then \( X \) is equal to
(a) \( \frac{1}{2}\left[\begin{array}{rr}2 & 4 \\ 3 & -5\end{array}\right] \)
(b) \( \frac{1}{2}\left[\begin{array}{rr}-2 & 4 \\ 3 & 5\end{array}\right] \)
(c) \( \left[\begin{array}{rr}2 & 4 \\ 3 & -5\end{array}\right] \)
(d) none of these
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