A particle with charge q, moving with a momentum p, enters a uniform magnetic field normally. The magnetic field has magnitude B and is confined to a region of width d, where $\mathrm{d}<\frac{\mathrm{p}}{\mathrm{Bq}}.$ If the particle is deflected by an angle $\theta$ in crossing the field, then

• A

  $\sin \mathrm{\theta }=\frac{\mathrm{Bqd}}{\mathrm{p}}$

• B

  $\sin \mathrm{\theta }=\frac{\mathrm{p}}{\mathrm{Bqd}}$

• C

  $\sin \mathrm{\theta }=\frac{Bp}{\mathrm{qd}}$

• D

  $\sin \mathrm{\theta }=\frac{pd}{Bq}$