This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'Peripheral neuritis is a deficiency sign of \nSelect and explain. \nA. Folic acid, B. Niacin, C. Thiamine, D. Tocopherol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Two principle deficiency diseases associated with thiamine deficiency are beriberi and Wernick&;s encephalopathy. Dry beriberi is associated with nerve involvement Ref: Park; 23rd ed; Page no: 618', 'role': 'assistant'}]