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 peroxycarboxylic acids with the carbonyl group of ketones produces: 
 Options:  <1> Acids <2> Esters. <3> Alcohols <4> Ethers <5> Amides
