Question

The potential of hollow speed radius 1m is 100 v the potential at 1/2 m and 2 m from the centre of the speed respectively

100 v and 50 v

Zero and 50 v

200 v and 50 v

150 v and 100 v

Answer 1

If the hollow sphere is conducting, then potential inside hollow sphere is constant and outside the sphere, thepotential is inversely proportional to distance from the center of sphere. If it is a insulator, then we cannot say that electric field inside the sphere is zero.
So if sphere is conducting, then inside the sphere potential become zero and your required answer will be (b)0V and 50V
Since you haven't mentioned whether the sphere is conducting or not I can't give the answer with confidence. So kindly ask with correct identities in next section and mark this section as satisfied.