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
Which of the following is not a component of MYPA medium 
Select and explain. 
A. Mannitol, B. Egg yolk, C. Polymixin, D. Azithromycin
D: Azithromycin
Answer: D: Azithromycin 
Explanation: MYPA--Modified mannitol-polymixin-B agar