A uniform \( \operatorname{rod} A B \) of length \( l \) and mass \...

A uniform \( \operatorname{rod} A B \) of length \( l \) and mass \( m \) is free to rotate about point \( A \). The rod is released from rest in the horizontal position. Given that the moment of inertia of the rod about \( A \) is \( m l^{2} / 3 \), the initial angular acceleration of the rod will be
(a) \( \frac{m g l}{2} \)
(b) \( \frac{3}{2} g l \)
(c) \( \frac{3 g}{2 l} \)
(d) \( \frac{2 g}{3 l} \)
\( (2007,2006) \)