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: Orthopaedics
Most common cause of osteomyelitis in drug abusers 
Select and explain. 
A. Staph aureus, B. Pseudomonas deruginosa, C. staph-Epidermidis, D. Salmonella
B: Pseudomonas deruginosa
Answer: B: Pseudomonas deruginosa 
Explanation: None