If the system of linear equations
$x+k y+3 z=0$
$3 x+k y-2 z=0$
$2 x+4 y-3 z=0$
has a non-zero solution $(x, y, z)$, then $\frac{x z}{y^{2}}$ is equal to :
10
-30
30
-10
Correct Option: 1
Solution Not Required
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