In a Mass Spectrometer,a Single-Charged Particle Has a Speed of 1.00

In a mass spectrometer,a single-charged particle has a speed of 1.00 × 10⁶ m/s and enters a uniform magnetic $\vec { B }$ of 0.200 T at a right angle to the $\vec { B }$ field vector.The radius of the resulting circular orbit is 20.75 cm.What is the mass of the particle? (e = 1.60 × 10^-19C)

A) 3.20 × 10^-27 kg
B) 6.64 × 10^-27 kg
C) 1.67 × 10^-27 kg
D) 9.11 × 10^-31 kg