This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
[{'content': 'Thiamine deficiency is known to occur in all of the following except \nSelect and explain. \nA. Food faddist, B. Homocystinemia, C. Chronic alcoholic, D. Chronic hea failure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: beriberi, may or may not be associated with hea failure and edema acute pernicious (fulminating) beriberi, in which hea failure and metabolic abnormalities predominate Wernicke encephalopathy is associated especially with alcohol and narcotic abuse ref harper 13th ed page 556', 'role': 'assistant'}]