Assertion (a): Is the order of reaction applicable to elementary as well as complex reactions? Reason (r): Does molecularity have any meaning for a complex reaction?
1: Both assertion (a) and reason (r) are true, and reason (r) is the correct explanation of assertion (a).
2: Both assertion (a) and reason (r) are true, but reason (r) is not the correct explanation of assertion (a).
3: Assertion (a) is true, but reason (r) is false.
4: Assertion (a) is false, but reason (r) is true.
