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: Biochemistry
[{'content': 'Essential amino acid amongst the following ? \nSelect and explain. \nA. Arginine, B. Lysine, C. Threonine, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All", 'role': 'assistant'}]