Definition: 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'.
Input: Question: Which halogens react with methane by a radical chain reaction generating haloamines? 
 Options:  <1> Fluor and chlorine. <2> Bromine and chlorine. <3> Fluor, chlorine and bromine. <4> Everyone. <5> Iodo.
