The electrostatic potential on the surface of a charged conducting sphere is 100V. Two statements
are made in this regard.
S₁ : At any point inside the sphere, electric intensity is zero.
S₂ : At any point inside the sphere, the electrostatic potential is 100 V.
Which of the following is a correct statement?           [NCERT Exemplar]

In this problem, the electric field intensity E and electric potential V are related as $\mathrm{E}=-\frac{\mathrm{dV}}{\mathrm{dr}}.$

Electric field intensity, E = 0 suggest that, $\frac{\mathrm{dV}}{\mathrm{dr}}=0$

This imply that V = constant.
Thus, E = 0 inside the charged conducting sphere causes, the same electrostatic potential 100 V at any point inside the sphere.
Note   V equals zero does not necessary imply that E = 0 e.g., the electric potential at any point on the perpendicular bisector due to electric dipole is zero but E not.
E = 0 does not necessary imply that V = 0 e.g., the electric field intensity at any point inside the charged spherical shell is zero but there may exist non-zero electric potential.