Task: Text Categorization
Input (English): Question: The conversion of pyruvate into ethanol and CO2 by yeasts: 
 Options:  <0> It produces an extra amount of ATP. <1> Reduce the NAD +. <2> Reoxidates the NADPH that forms in glycolysis. <3> It allows glycolysis to continue even in the absence of oxygen. <4> Allows CO2 to be used in the synthesis of fatty acids.
Output (English): biology