Directions In the following questions, an Assertion (A) is followed...

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Directions
In the following
questions, an Assertion (A) is followed by a
corresponding Reason (R). Use the following keys to
choose the appropriate answer.
(a) Both A and R are correct; \( \mathrm{R} \) is the correct explanation of A.
(b) Both A and R are correct; \( \mathrm{R} \) is not the correct explanation of A.
(c) \( \mathrm{A} \) is correct; \( \mathrm{R} \) is incorrect.
(d) \( \mathrm{R} \) is correct; \( \mathrm{A} \) is incorrect.
. Assertion (A) On heating \( \mathrm{NaCl} \) and \( \mathrm{ZnO} \) turn yellow.
Reason (R) This happens due to metal excess defect due to anionic vacancies.
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