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 infrared spectrum of procaine hydrochloride shows an intense band about 1700 cm-1. What information does this data provide about its structure? 
 Options:  <1> It has an aromatic ring. <2> It has a carbonyl group. <3> It is a tertiary amine. <4> It is an aromatic amine. <5> It is a salt.
