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Assertion (A) : When a conducting wire loop which is inside a uniform magnetic field directed perpendicular to its plane, is moving with uniform velocity, an emf is induced in it. Reason (R): When the magnetic flux linked with a conducting wire loop changes with time an emf is induced in the cable.

A)  Both (A) and (R) are true, and (R) is the correct explanation of

B)  Both (A) and (R) are true, but (R) is not the correct explanation of

C)  (A) is true, but (R) is false

D)  (A) is false, but (R) is true