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': 'Why cereals and pulses are combined \nSelect and explain. \nA. 10% cereals contain protein and pulses contain 40%, B. Cereals are deficient in methionine and lysine is deficient in pulses, C. Cereals are deficient in lysine and methionine is deficient in pulses, D. Cereals are rich in essential AA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]