Task: Text Categorization
Input (English): Question: The Cori cycle: 
 Options:  <0> It involves the synthesis and degradation of glycogen. <1> It does not imply the conversion of lactate into pyruvate. <2> It only takes place in the liver. <3> Oxidizes tricarboxylic acids. <4> It involves glycolysis and gluconeogenesis.
Output (English): biology