The weight of an object at the centre of the earth of radius R  will be ______________.

Choose the correct option to complete the sentence.

The weight of a body is the gravitational force exerted on the body and it is given as:
Weight = Mass x Acceleration due to gravity 
The acceleration due to gravity is maximum on the surface of the earth and as we move towards the centre of the equator it becomes zero.
As a result, the weight of the body will also become zero at the centre of the earth.