If $z$ is a complex number so that $iz^2-\overline z=0$, then $|z|= ?$

Question

$\begin{array}{1 1}(A) \;0 \;or \;1 \\(B)\;0 \;or\; \large\frac{\sqrt 3}{2} \\(C)\;1\;or \;\large\frac{\sqrt 3}{2} \\(D)\; 0 \;or\;\large\frac{1}{20} \end{array}$