1.

(A): Spring balances show wrong readings after they has been used for a long time(R): On using for a long time, spring balances loose its elastic strength

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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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