Task: Question Answering
Input (English): Question: One of the following enzymes is classified as MAL: 
 Options:  <1> Lactate dehydrogenase - Oxidoreductase. <2> Chymotrypsin - Hydrolase. <3> Fumarasa - Liasa. <4> Aminoacyl-tRNA synthetase - Ligase <5> Nucleoside monophosphate kinase - Isomerase.
Output (English): 5