This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Biochemistry
[{'content': 'Products of uronic acid pathway in human beings are all EXCEPT: \nSelect and explain. \nA. Vitamin C, B. Pentoses, C. NADH, D. Glucuronic acid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Humans cannot synthesize vitamin C due to deficiency of enzyme, L-Gulonolactone Oxidase Uronic acid pathway in humans', 'role': 'assistant'}]