1.

(A) Liquid helium can be used as a cryogenic liquid(R) Liquid helium can produce a very low temperatures of around 4.2k

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Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
Both (A) and (R) are false

Answer :A


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