1.

Assertion. The water pouch of instant cold pack for treating athletic injury breaks injury breaks when squeezed and NH_(4)NO_(3) dissolved lowers the temperature. Reason. Additon of non-volatile solute into solvent resultsinto the depression of freezing point of the solvent.

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If both A and R are true,andR is the trueexplanation of A.
If both A and R are true,but R is not the true EXPLANATION of A.
If A is true, but R is false
If both A and R are false.

Answer :b


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