Let $z=\begin{vmatrix}1&2+3i&4+5i\\2-3i&6&7+8i\\4-5i&7-8i&-9\end{vmatrix}$,then

Question

$\begin{array}{1 1}(A)z \;is\;purely\;real \\ (B) z \;is\;purely\;imaginary \\ (C) z=0 \\(D) none\;of\;these \end{array}$