Two spheres of the same material have the same radius but one is hollow while the other is solid...

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Two spheres of the same material have the same radius but one is hollow while the other is solid. Both spheres are heated to same temperature. Then
[Odisha JEE 2010]
(a) The solid sphere expands more
(b) The hollow sphere expands more
(c) Expansion is same for both
(d) Nothing can be said about their relative expansion if their masses are not given
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