This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins, Subject name: Social & Preventive Medicine
Which amino acid is deficient in pulses: 
Select and explain. 
A. Lysine, B. Threonine, C. Methionine, D. Cysteine
C: Methionine
Answer: C: Methionine 
Explanation: Ans. (c) MethionineRef K. Park 23rded. i628* Pulses protein are poor in methionine and to a lesser extent in cysteine.* Since option C and D both are correct, we have to choose single best answer and that will be Methionine. Literatures clearly states that cysteine is deficient only up to a lesser extent.