Task: Text Categorization
Input (English): Question: The reaction of Wolff-Kishner is one: 
 Options:  <0> Oxidation of carbonyls to give acids. <1> Reduction of carbonyls to alcohols. <2> Deoxygenation of carbonyls that takes place in an acid medium. <3> Deoxygenation of carbonyls that is carried out in an alkaline medium. <4> Carbonyl deoxygenation performed in neutral medium.
Output (English): chemistry