A proton (mass $\left.=1.67\times {10}^{-27}\text{kg and charge }=1.6\times {10}^{-19}\text{C}\right)$ is projected in a uniform magnetic field of 2 Wb/m² with a velocity $3.4\times {10}^7\text{m}/\text{s}$ in a direction perpendicular to the field. The acceleration of the proton should be

• A

  $6.5\times {10}^{15}\text{m}/{\text{s}}^2$

• B

  $6.5\times {10}^{13}\mathrm{m}/{\mathrm{s}}^2$

• C

  $6.5\times {10}^{11}\mathrm{m}/{\mathrm{s}}^2$

• D

  $6.5\times {10}^9\text{m}/{\text{s}}^2$