Assertion : Liquefied cryogenic gases are sprayed on electric cables in big cities.
Reason: Liquefied cryogenic gases prevent wastage of power

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is incorrect but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Assertion: Liquified gases are spread on electric cable in big cities.
Reason: Liquified gases prevent wastage of power.
Assertion and Reason both are true because liquified gases are sprayed on cable to keep them cool and reduced heat losses prevents wasting of power.
So reason is correct explanation for assertion.

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Assertion : Liquefied cryogenic gases are sprayed on electric cables in big cities. Reason: Liquefied cryogenic gases prevent wastage of power

Assertion : Liquefied cryogenic gases are sprayed on electric cables in big cities.
Reason: Liquefied cryogenic gases prevent wastage of power