Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by : -

Einside = \(\frac{GMr}{R^3}\) Esuface = \(\frac{GMr}{R^2}\) Eoutside = \(\frac{GMr}{r}\) at r=0, i.e., at the centre of the earth E= 0