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
Which is not a product of Pentose phosphate pathway 
Select and explain. 
A. Glyceraldehyde 3 PO4, B. NADPH, C. Sedoheptulose PO4, D. CO2
D: CO2
Answer: D: CO2 
Explanation: None