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
Culture media used for diagnosis of EHEC O157:H7 
Select and explain. 
A. O culture, B. Sorbitol macconkey agar, C. XLD agar, D. Deoxycholate media
B: Sorbitol macconkey agar
Answer: B: Sorbitol macconkey agar 
Explanation: None