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: Social & Preventive Medicine
[{'content': 'Limiting amino acid in maize ? \nSelect and explain. \nA. Lysine, B. Threonine, C. Methionine, D. Arginine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'a' i.e., Lysine Food Limiting amino acidsWheat Lysine and threonineMaize Tryptophan and lysinePulses Methionine and to a lesser extent cystein", 'role': 'assistant'}]