This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal Radiology, Subject name: Radiology
[{'content': 'Marble Bone disease is ? \nSelect and explain. \nA. Osteoporosis, B. Osteopoikilosis, C. Osteopetrosis, D. Fibrous Dysplasia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: *Marble Bone disease is another name of Osteopetrosis/Albers-Schonberg Disease', 'role': 'assistant'}]