Suppose particles 1 and 2 enter the magnetic field $\vec{B} = B_0 \hat{k}$ with velocities $\vec{v}_1 = v_1 \hat{i}$ and $\vec{v}_2 = v_2 \hat{i}$. Then : (A) both particles revolve clockwise (B) both particles revolve anticlockwise (C) particle 1 revolves clockwise while particle 2 revolves anticlockwise (D) particle 1 revolves anticlockwise while particle 2 revolves clockwise