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
[{'content': 'Which amino acid is deficient in pulses: \nSelect and explain. \nA. Lysine, B. Threonine, C. Methionine, D. Cysteine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]