A charge partilce with velocity V=xhati+...

A charge partilce with velocity `V=xhati+yhatj` moves in a magnetic field `B=yhati+xhatj.` The magnitude of magnetic force acting on the particle is F. Which one of the following statement(s) is/are correct ?

a and b are true

a and c are true

b and d are true

c and d are true

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