2,1,3 (second option)
explanation
We know that the magnetic force is given by
F = q v B sin(theta)
for 3, v is parallel to B so theta = 0
F3 = 0
For 2, theta = 90 deg
F = q v B
for 1, theta = 45 or any other value, so it will be less than q v B
So the order (largest to smallest)
2, 1 , 3
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