d
(d) Given set of equations will have a non trivial solution if the determinant of coefficient of $x, y, z $ is zero
i.e., $\left| {\,\begin{array}{*{20}{c}}1&k&3\\3&k&{ - 2}\\2&3&{ - 4}\end{array}\,} \right| = \,0\, $
$\Rightarrow 2k - 33 = 0$ or $k = \frac{{33}}{2}$.