Which of the following expressions does not represent simple harmonic motion

Which of the following expressions does not represent a simple hormonic motion ?

In simple harmonic motion

Simple harmonic motion is

Which of the following equation does not represent a simple harmonic motion

As the expression in ivolving sine function , which of the following equations does not represent a simple harmonic motion ?

In a simple harmonic motion

In a simple harmonic motion

Which of the following expressions represent simple harmonic motion?

Which of the following expressions corresponds to simple harmonic motion along a straight line , where x is the displacement and a, b, c are positive constant ?