A cyclotron has an oscillator frequency `12MHz` and a dee of radius `50cm`. Calculate the magnetic induction needed to accelerate deuterons of mass `3.3 xx 10^(-27)kg` and charge `1.6xx10^(-19)C`
A. `1.55wb//m^(2)`
B. `2.55wb//m^(2)`
C. `0.55wb//m^(2)`
D. `3.55wb//m^(2)`