Task: Text Categorization
Input (English): Question: One of the enzymes mentioned below does not intervene in glycogen metabolism: 
 Options:  <0> Glycogen synthase. <1> Glycogen phosphorylase. <2> Glucose-6-phosphate dehydrogenase. <3> Phosphoglucomutase <4> UDP-glucose pyrophosphorylase.
Output (English): chemistry