A uniform but time-varying magnetic field B(t) exists in a circular region of radius a and is directed into the plane of the paper, as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region
A. Is zero
B. Decreases as `(1)/(r)`
C. Increases as r
D. Decreases as `(1)/(r^(2))`
