CTET Class I to V 6 Jan 2022 Paper

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Question : 64 of 150

Marks: +1, -0

Woollens keep us warm in winters. The reason for woollens being insulators is that

Woollen fibres are tightly wrapped with each other and do not allow cold air to pass
Woollen fibres have air trapped within them and air is an insulator.
Woollen fibres are thick and control the outside temperature.
Woollen fibres are thick and do not allow cold air to pass through.

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