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: Pediatrics
[{'content': 'Septic arthritis in a 2-year-old child is often caused by – \nSelect and explain. \nA. Hemophilous influenzae, B. Staphylococcus aureus, C. Gonococi, D. Pneumococci', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bacteria are the most common pathogens in acute skeletal infections.\nThe microbial spectrum is diverse in suppurative arthritis, but Staphylococcus aureus infection is most common.\nSalmonella is the most common cause of osteomyelitis in children with sickle cell anemia.', 'role': 'assistant'}]