# If $\begin{vmatrix}6i&-3i&1\\4&3i&-1\\20&3&i\end{vmatrix}=x+iy$ then
$\begin{array}{1 1}(a)\;x=3,y=1&(b)\;x=1,y=3\\(c)\;x=0,y=3&(d)\;x=0,y=0\end{array}$