A Proton,mass 1

A proton,mass 1.67 × 10−²⁷ kg and charge +1.6 × 10−¹⁹ C,moves in a circular orbit perpendicular to a uniform magnetic field of 0.86 T.Find the time for the proton to make one complete circular orbit.

A) 2.4 × 10−⁸ s
B) 7.6 × 10−⁸ s
C) 3.8 × 10−⁸ s
D) 1.2 × 10−⁸ s
E) Not enough information is given.