Which one of the following is simple harmonic?

Options

A. Rotation of earth around the sun
B. Rotation of earth about is own axis
C. Revolving motion of a top
D. Motion of oscillating liquid column in U-tube

Answer

D

Explanation

Simple harmonic motion is a special type of periodic motion, in which a particle moves to and fro repeatedly about a mean position.
So, motion of oscillating liquid column in U-tube is simple harmonic,