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Subject :Physics    Class : Class 7

On a cold day, it is hard to open the lid of a tight container. But when you gently heat the neck you can easily open the lid. Why?

A On heating glass expands and lid contracts.
B On heating lid expands more than the neck and thus slides easily.
C Neck becomes slippery on heating.
D Lid of the bottle cannot bear the heat.

Explain please

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