Two coil have a mutual inductance 0.005 H. The current changes in first coil according to equation $I = I_{0}$ sin $\omega$t where $I_{0} = 2A$ and $\omega= 100\pi$ rad/sec. The maximum value of emf in second coil is :

Question

( A ) $3\pi$
( B ) $2\pi$
( C ) $\pi$
( D ) $4\pi$