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(1) If both Assertion (A) and Reason (R) are True and the Reason (R) is a correct explanation of the Assertion (A).
(2) If both Assertion (A) and Reason (R) are True but Reason (R) is not a correct explanation of the Assertion (A).
(3) If Assertion (A) is True but the Reason (R) is False.
(4) Assertion (A) is False but Reason (R) is True.
Assertion (A): For the reaction \( \mathrm{RCl}+\mathrm{NaOH}(\mathrm{aq}) \rightarrow \mathrm{ROH} \) \( +\mathrm{NaCl} \), the rate of reaction is reduced to half on reducing the concentration of \( \mathrm{RCl} \) to half.

Reason (R): The rate of the reaction is represented by \( \mathrm{k} \) \( [\mathrm{RCl}] \), i.e., it is a first order reaction.
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