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Assertion (A): In the preparation of HBr from NaBr, HNO3 is used in preference to H3PO4

Reason (R): HNO3 is a stronger acid than H3PO4

(a) Both (A) and (R) are true and (R) is the correct explanation for (A)

(b) Both (A) and (R) are true, but (R) is not the reason for (A)

(c) (A) is true, but (R) is false

(d) (A) is false, but (R) is true

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