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: The reaction of 1H-indole with electrophiles takes place selectively on the atom in position: 
 Options:  <1> one. <2> two. <3> 3. <4> Four. <5> 5.
