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
Pulse proteins are deficient in ? 
Select and explain. 
A. Methionine, B. Lysine, C. Threonine, D. All
A: Methionine
Answer: A: Methionine 
Explanation: None