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': '. Proper functioning of Kreb cycle does not occur with deficiency of: \nSelect and explain. \nA. Thiamane, B. Riboflavin, C. Vitamin E, D. Vit K', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Thiamine; B i.e. Riboflavin', 'role': 'assistant'}]