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A proton, a neutron , and an electron an...

A proton, a neutron , and an electron and an alpha particle enter a region of constant magnetic field with equal velocities . The magnetic field is along the inward normal to the plane of the paper . The tracks of the particles are labelled in fig. the electron follows track .... and the alpha particle follows track.....

A

D

B

C

C

B

D

A

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The correct Answer is:
A
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