Two Imaginary Spherical Surfaces of Radius R and 2R Respectively $N _ { 2 } = \frac { 1 } { 4 } N _ { 1 }$

Two imaginary spherical surfaces of radius R and 2R respectively surround a positive point charge Q located at the center of the concentric spheres.When compared to the number of field lines N₁ going through the sphere of radius R,the number of electric field lines N₂ going through the sphere of radius 2R is

A) $N _ { 2 } = \frac { 1 } { 4 } N _ { 1 }$ .
B) $N _ { 2 } = \frac { 1 } { 2 } N _ { 1 }$ .
C) N₂ = N₁.
D) N₂ = 2N₁.
E) N₂ = 4N₁.