A body has the following combinations of acceleration, position, velocity at one instant while the fourth parameter is its initial position. Which of the following combinations describes $SHM$:

Question

$\begin{array}{1 1}(a)\;9,3.5,3,.5 \\(b)\;5,4,1,0 \\( c)\; 7,3,2,9 \\(d)\;2,3,2,7 \end{array}$