A charged particle moves in a uniform magnetic field `B=(2hati-3hatj)` T
A. if velocity of the particles is `(6hatK)m//s`, particle moves in a circle
B. if velocity of the particle is `(-4hati+6hatj)m//s`, particle moves in a straight me
C. if velocity of the particle is `(hati+2hatj)m//s`, particle moves in a helical path
D. In all the above three cases speed of the particle remains unchanged
