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 ketones and aldehydes by the presence of their carbonyl group preferably gives: 
 Options:  <1> Nucleophilic substitution reactions. <2> Oxidation reactions to alcohols. <3> Nucleophilic addition reactions. <4> Reduction reactions to carboxylic acids. <5> They are not reactive towards nucleophiles.
