At time t = 0 a particle starts travelling from a height 7\(\hat{z}\) cm in a plane keeping z coordinate constant. At any instant of time it’s position along the x and y directions are defined as 3t and 5t3 respectively. At t = 1s acceleration of the particle will be
(A) -30y
(B) 30y
(C) 3x +15y
(D) 3x + 15y 7\(\hat{z}\)
