Task: Text Categorization
Input (English): Question: In the regulation of glycogen metabolism by adrenaline: 
 Options:  <0> Adenylate cyclase is inhibited. <1> Protein kinase A is inhibited through cAMP. <2> Glycogen synthetase is inhibited by phosphorylation. <3> Glycogen phosphorylase is inhibited by phosphorylation. <4> The main enzyme that carries it out is protein kinase C.
Output (English): biology