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
Cereals are rich in which amino acid ? 
Select and explain. 
A. Lysine, B. Threonine, C. Tiyptophan, D. Methionine
D: Methionine
Answer: D: Methionine 
Explanation: Ans. is 'd' i.e., Methionine "Pulses have high lysine content and are deficient in methionine; on the other hand cereals have an abundance of methionine"