Which one of the following matrices is singular?
(A) $\left[\begin{array}{ll}2 & 5 \\ 1 & 3\end{array}\right]$
(B) $\left[\begin{array}{ll}3 & 2 \\ 2 & 3\end{array}\right]$
(C) $\left[\begin{array}{ll}2 & 4 \\ 3 & 6\end{array}\right]$
(D) $\left[\begin{array}{ll}4 & 3 \\ 6 & 2\end{array}\right]$
Which one of the following matrices is singular?
(A) $\left[\begin{array}{ll}2 & 5 \\ 1 & 3\end{array}\right]$
(B) $\left[\begin{array}{ll}3 & 2 \\ 2 & 3\end{array}\right]$
(C) $\left[\begin{array}{ll}2 & 4 \\ 3 & 6\end{array}\right]$
(D) $\left[\begin{array}{ll}4 & 3 \\ 6 & 2\end{array}\right]$
$\left[\begin{array}{ll}2 & 4 \\ 3 & 6\end{array}\right]$