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The moment of inertia of a solid sphere, about an axis parallel to its diameter and at a distance of x from it, is 'I(x)'. Which one of the graphs represents the variation of I(x) with x correctly ?

1. I(x) x O
2. I(x) x O
3. I(x) O x
4. I(x) O x

Correct answer: I(x) O x

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