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: Pediatrics
[{'content': "Thiamine deficiency - causes ? \nSelect and explain. \nA. Pellagra, B. Ben - Beri, C. Keshan's disease, D. Rickets", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Beri-Berl Beri-beri Deficiency of thiamine (Vit B]) Can be dry (neural involvement)", 'role': 'assistant'}]