Electric potential at a point P , due to a point charge q at A at distance r from P is V . Then if double of this charge is uniformly distributed on a hollow sphere of radius 2r centered at A then potential at P due to sphere is

Question

$(a)\;V \qquad(b)\;\large\frac{V}{2}\qquad(c)\;\large\frac{3 V}{2}\qquad(d)\;None$