A ball is projected from origin at time ...

A ball is projected from origin at time t= 0. The x and A y coordinates of its displacement are given by `(x = 4t^2)` and y = (3t - 5). Then its instantaneous velocity at any time t is

A

`(8 hatj + 3 hat j)`

B

`(8t hatj + 3 hat j)`

C

`(4t hatj - 5 hat j)`

D

`(4 hatj - 3 hat j)`

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