This is weird.
All three 'choices' are true.
Line um up. (a) shows how to solve the problem. (b) does it. and (c) is the answer.
Answer:
E = 58.7 V/m
Explanation:
As we know that flux linked with the coil is given as

here we have


now we have

now the induced EMF is rate of change in magnetic flux

now for induced electric field in the coil is linked with the EMF as




