This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Osteoporosis circumscripta is a finding seen in \nSelect and explain. \nA. Pagets disease, B. Osteosarcoma, C. Multiple myeloma, D. Osteomyelitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]