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
Limiting amino acid in maize ? 
Select and explain. 
A. Lysine, B. Threonine, C. Methionine, D. Arginine
B: Threonine
Answer: B: Threonine 
Explanation: Ans. is 'a' i.e., Lysine Food Limiting amino acidsWheat Lysine and threonineMaize Tryptophan and lysinePulses Methionine and to a lesser extent cystein