Statement-1: Order of reaction is applicable to elementary as well as complex reactions.
Statement-2: For complex reactions the order is given by the slowest step and the molecularity of the slowest step is the same as the order of the overall reaction.

the order of reaction is a fundamental concept that applies to all chemical reactions, whether they are elementary or complex.Molecularity is a term that is used to describe the number of molecules or ions that are involved in an elementary reaction step. In a complex reaction, there may be multiple steps, each with its own molecularity, making it difficult to determine the overall molecularity of the reaction.