In an electromagnetic wave in free space the root mean square value of the electric field is $E_{rms} = 6\; V/m$. The peak value of the magnetic field is :

Question

( A ) $0.70 \times 10^{-8} T$
( B ) $4.23 \times 10^{-8} T$
( C ) $2.83 \times 10^{-8} T$
( D ) $1.41 \times 10^{-8} T$