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
Phage typing can be done for ? 
Select and explain. 
A. Salmonella, B. Streptococcus, C. Shigella, D. Pseudomonas
A: Salmonella
Answer: A: Salmonella 
Explanation: Ans. is 'a' i.e., Salmonella