This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sickle Cell Anemia, Subject name: Medicine
The organism causing osteomyelitis in sickle cell anemia: 
Select and explain. 
A. Salmonella, B. Staphylococcus, C. H. influenza, D. E.coli
A: Salmonella
Answer: A: Salmonella 
Explanation: Ans. is 'a' i.e., Salmonella o Most common cause of osteomyelitis in sickle cell anemia is salmonella.