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
Cetrimide culture media used in which infection? 
Select and explain. 
A. E. coli, B. V. cholerae, C. Staph aureus, D. Pseudomonas
D: Pseudomonas
Answer: D: Pseudomonas 
Explanation: Ans. is 'd' i.e., Pseudomonas