Which one of the following equation at the repressents simple harmonic motion ?

Options

A. Acceleration `= - k_(0)x + k_1x^(2)`
B. Acceleration `= -k(x + a)`
C. Acceleration `= k(x + a)`
D. Acceleration `= kx`

Answer

B

Explanation

Acceleration `prop-` (displacement)
`A = - y`
`A = -0 omega ^(2)t`
`A = - (k)/(m)y`
`A = - ky`
Here `y = x + a`
acceleration `= - k(x + a)`