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: Microbiology
All of the following are anaerobic media except 
Select and explain. 
A. Robertson cooked meat broth, B. Brain heart infusion agar, C. Egg yolk agar, D. CLED agar
D: CLED agar
Answer: D: CLED agar 
Explanation: CLED agar is a differential media.