Least positive argument of the \( 4^{\text {th }} \) root of the co...

Least positive argument of the \( 4^{\text {th }} \) root of the complex number \( 2-i \sqrt{12} \) is :
(a) \( \frac{\pi}{6} \)
(b) \( \frac{\pi}{12} \)
(c) \( \frac{5 \pi}{12} \)
(d) \( \frac{7 \pi}{12} \)