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H^(+), He^(+) and O^(++) all having the ...

` H^(+), He^(+) and O^(++)` all having the same kinetic energy pass through a region in which there is a uniform magnetic field perpendicular to their velocity . The masses of ` H^(+), He^(+) and O^(2+)` are `1 amu, 4 amu and 16 amu` respectively . Then

A

a , b

B

a,b,c

C

only a

D

a,c

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The correct Answer is:
D
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