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': "Albers-Schonberg's disease is \nSelect and explain. \nA. Osteomyelitis, B. Osteopetrosis, C. condensing osteitis, D. OsteomaLacia", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]