Two Concentric Imaginary Spherical Surfaces of Radius R and 2R $\phi$

Multiple Choice

Two concentric imaginary spherical surfaces of radius R and 2R respectively surround a positive point charge Q located at the center of the surfaces.When compared to the electric flux $\phi$ ₁ through the surface of radius R,the electric flux $\phi$ ₂ through the surface of radius 2R is

A) $\Phi _ { 2 } = \frac { 1 } { 4 } \Phi _ { 1 }$ .
B) $\Phi _ { 2 } = \frac { 1 } { 2 } \Phi _ { 1 }$ .
C) $\phi$ ₂ = $\phi$ ₁.
D) $\phi$ ₂ = 2 $\phi$ ₁.
E) $\phi$ ₂ = 4 $\phi$ ₁.