Task: Text Categorization
Input (English): 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:  <0> It has an aromatic ring. <1> It has a carbonyl group. <2> It is a tertiary amine. <3> It is an aromatic amine. <4> It is a salt.
Output (English): pharmacology