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: Pathology
[{'content': 'Acute osteomyelitis is most frequently caused by: \nSelect and explain. \nA. Staphylococcus aureus, B. Staphylococcus albus, C. Staph. aureus + Staph. albus, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Acute osteomyelitis is usually a polymicrobial infection. Different types of organisms may be cultured from these lesions; the most common are Staphylococcus aureus and Staphylococcus albus, and various streptococci. Anaerobes such as Bacteroides, Porphyromonas or Prevotella species also predominate.\nRef: Shafer's textbook of oral pathology 7th edition page 493", 'role': 'assistant'}]