Q. Which of these is an insulator?

इनमें से कौन सा एक इन्सुलेटर है?

A
Silver
चाँदी
B
Water
पानी
C
Iron
लोहा
D
Rubber
रबड़

Explanation

Rubber is an excellent insulator, meaning it does not allow heat (or electricity) to pass easily. It is widely used for handles, protective gear, and wires for safety.
Silver, water, and iron are conductors.

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