This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
About glycolysis true is 
Select and explain. 
A. Occurs in mitochondria, B. Complete breakdown of glucose, C. Conversion of glucose to 3C units, D. 3 ATPs are used in anaerobic pathway
C: Conversion of glucose to 3C units
Answer: C: Conversion of glucose to 3C units 
Explanation: Glycolysis occurs in cytosol.
A 6 carbon glucose molecule is converted to 2 molecules of 3 carbon unit pyruvate or lactate. Complete breakdown of glucose to CO2 and H2O occurs finally in TCA cycle.
Both in aerobic as well as anaerobic glycolysis, 2 ATPs are consumed (not 3 ATPs).