If one were to apply Bohr model to a particle of mass $'m'$ and charge $'q'$ moving in a plane under the influence of a magnetic field $'B'$, the energy of the charged particle in the $n^{th}$ level will be :

Question

( A ) $n (\frac{hqB}{2 \pi m})$
( B ) $n (\frac{hqB}{4 \pi m})$
( C ) $n (\frac{hqB}{ \pi m})$
( D ) $n (\frac{hqB}{8 \pi m})$