A body falling from rest under gravity passes a certain point P. It was at a distance of 400 m from P, 4 seconds prior to passing through P. If $g = 10\; m/s^2$, then the height above the point P from where the body began to fall is :

Question

( A ) 320 m
( B ) 680 m
( C ) 900 m
( D ) 720 m