A simple pendulum of length l is pulled aside to make an angle $\theta$ with the vertical. What is the magnitude of the torque of the weight of the bob about the point of suspension ?

Question

$$\begin {array} {1 1} (a)\;mg \sin \theta l & \quad (b)\;mg \cos l \\ (c)\;mgl & \quad  (d)\;mg l/2 \sin \theta \end {array}$$