Q: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Question: The reactions in which the kinetics does not depend on the nucleophilic concentration, are reactions:
Options: <1> Radicals <2> SN1. <3> Pericyclic. <4> SN2. <5> None of the above.
A:
2