This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Which of the following is not a component of MYPA medium \nSelect and explain. \nA. Mannitol, B. Egg yolk, C. Polymixin, D. Azithromycin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: MYPA--Modified mannitol-polymixin-B agar', 'role': 'assistant'}]