This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and Health, Subject name: Social & Preventive Medicine
Cereal protein is deficient in which amino acid - 
Select and explain. 
A. Leucine, B. Lysine, C. Phenylalanine, D. Tryptophan
B: Lysine
Answer: B: Lysine 
Explanation: Ans. is 'b' i.e., Lysine Supplementary action of proteinso Cereals are deficient in essential amino acid Lysine & threonine,o Pulses are deficient in essential amino acid Methionine.o So if cereals are eaten with pulses, their proteins complement each other & provide a more balanced and complete protein intake.FoodDeficiencyCerealsWheatMaizePulsesSoyabeanLysine & threonineLysine & threonineTryptophan & lysineMethionine & cysteineMethionine