Assertion :The magnitude of the gravitational potential at the surface of solid sphere is less than that of the centre of sphere. Reason: Due to the solid sphere, the gravitational potential is the same within the sphere.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Gravitational potential is same everywhere in a hollow sphere. However in solid sphere, it varies as $- \frac{G M}{r}$ . It increases as the magnitude of r increases.

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