Let `P(r)=(Q)/(piR^4)r` be the charge density distribution for a solid sphere of radius R and total charge Q. For a point 'p' inside the sphere at distance `r_1` from the centre of the sphere, the magnitude of electric field is:

Options

A. `Q/(4 pi epsilon_0 r_1^2)`
B. `(Qr_1^2)/(4 pi epsilon_0 R^4)`
C. `(Qr_1^2)/(3 pi epsilon_0R^4)`
D. 0