This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection of Bones & Joints, Subject name: Orthopaedics
[{'content': 'Most common cause of osteomyelitis is - \nSelect and explain. \nA. Staphylococcus Aureus, B. Pseudomonas Aeruginosa, C. EColi, D. Streptococcus Pyogens', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Staphylococcus Aureus Organisms causing acute osteomyelitiso It is caused most commonly by staphylococcus aureuso Other causative organisms are streptococcus, pneumococcus, and gram negative bacilli.o Infection by pseudomonas becomes proportionally much more common in IV drug abuser. But, the most common organism is staphylococcus aureus", 'role': 'assistant'}]