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: Pharmacology
In treatment of Pseudomonas infections, carbencillin is frequently combined with: 
Select and explain. 
A. Penicillin, B. Gentamycin, C. Ciprofloxacin, D. Amoxycillin
B: Gentamycin
Answer: B: Gentamycin 
Explanation: Gentamycin