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
[{'content': 'Increase in pyruvate and lactate is seen in which of the following deficiency? \nSelect and explain. \nA. Thiamine, B. Pyridoxine, C. Niacin, D. Vitamin C', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]