A rod of length 50 cm is pivoted at one end. It is raised such that it makes an angle of 30$$^{\circ}$$ from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rad s$$^{-1}$$) will be: ($$g = 10$$ ms$$^{-2}$$)

A

$$\sqrt{\frac{20}{3}}$$

B

$$\sqrt{30}$$

C

$$\sqrt{\frac{30}{2}}$$

D

$$\frac{\sqrt{30}}{2}$$