Task: Text Categorization
Input (English): Question: Pyruvate carboxylase: 
 Options:  <0> It requires biotin. <1> Use a methyl group activated as a carbon source. <2> It catalyzes the production of acetyl-CoA and carbon dioxide. <3> It is activated in the muscle during the Cori cycle. <4> It is an intermediate of the citric acid cycle.
Output (English): biology