Solve this:

38.  A proton moving with a velocity of (6i + 8j) $\times$ 10⁵ ms ^$-$1 enters uniform magnetic field of induction 5 $\times$ 10 ^$-$3  $\hat{k}$ tesla. The magnitude of the force acting on the proton is (i, j and k are unit vectors along X, Y, Z directions respectively)

1) zero                             2) 8 $\times$ 10 ^$-$16 N                               3) 3 $\times$ 10 ^$-$16 N                     4) 4 $\times$ 10 ^$-$16 N