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': 'Rice is deficient in which amino acid ? \nSelect and explain. \nA. Serine, B. Threonine, C. Methonine, D. Cystone', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'B' i.e., Threonine Cereals (wheat & rice) are deficient in lysine threonine. But in comparison to other cereals protein (e.g wheat) rice protein contains more lysine (though in lesser amounts) - thus rice proteins is considered to be better quality among cereals.", 'role': 'assistant'}]