This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopaedics Q Bank, Subject name: Orthopaedics
[{'content': 'Most common osteomyelitis causing organisms in IV drug abusers? \nSelect and explain. \nA. Staphylococcus aureus, B. Pseudomonas, C. Salmonella, D. Pasteurella', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Osteomyelitis- M/C causitive organisms in i.v drug abuser is pseudomonas :-', 'role': 'assistant'}]