Out of the following functions representimg motion of a particle which represents SHM?1).`y = sin omega t - cos omega t, 2).y = sin^3 omega t ,3). y= 5 cos (3pi)/4 - 3 omega ^2 t, 4). y=1+ omega t+omega^2 t^2`.

Options

A. Only(1) and(2)
B. Only (1)
C. Only (4) does not represent SHM
D. Only (1) and (3)