Consider the following statements in respect of a body executing simple harmonic motion:

1). Periodic time is the time for one complete revolution 2). The acceleration is directed towards the centre of suspension 3). The acceleration is proportional to distance from mean position 4). The velocity will be maximum when it passes through mean position Of these statements

(a) 1,2 , and 3 are correct

(b) 2,3 , and 4 are correct

(c) 1,3 , and 4 are correct

(d) 1,2 , and 4 are correct.