This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gluconeogenesis, Subject name: Biochemistry
[{'content': 'The molecule marked by blue question mark can be all of the following EXCEPT \nSelect and explain. \nA. Pyruvate, B. Lactate, C. Alanine, D. Glycerol', 'role': 'user'}, {'content': "Answer: D \nExplanation: The picture shown in the question can be of Cori cycle or glucose-alanine cycle which releases lactate and alanine respectively. Pyruvate is second intermediate in those cycles. (Look at treasure for Cori's pathway) But glycerol is released from adipocytes. So, it could not be the one marked by red question mark in the image shown in the question.", 'role': 'assistant'}]