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: Medicine
[{'content': 'Thiamine deficiency is known to occur in all of the following except - \nSelect and explain. \nA. Food Faddist, B. Homocystenemia, C. Chronic alcoholic, D. Chronic heart failure patient of diuretics', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]