Task: Question Answering
Input (English): 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.
Output (English): 3