Assertion :Liquid helium commonly used in cryogenics application. Reason: Liquid Helium allows for the lowest attainable temperature to be reached.

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 correct but Reason is incorrect

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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
For cryogenics applications, we need very low temperature to remove heat.
Liquid Helium can attain liquid state below 5K which is suitable for the cryogenic application. Hence Liquid Helium is commonly used in cryogenic applications.

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