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A truck is stationary and has a bob susp...

A truck is stationary and has a bob suspended by a light string, in a frame attached to the truck. The truck suddenly moves to the right with an acceleration of a. The pendulum will tilt

A

to the left and angle of inclination of the pendulum with the vertical is `tan^-1(g/a)`

B

to the left and angle of inclination of the pendulum with the vertical is `sin^-1(g/a)`

C

to the left and angle of inclination of the pendulum with the vertical is `tan^-1(a/g)`

D

to the left and angle of inclination of the pendulum with the vertical is `sin^-1(a/g)`

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