This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bony dysplasia and soft tissue affection, Subject name: Orthopaedics
[{'content': 'Albers schonberg disease is - \nSelect and explain. \nA. Osteopetrosis, B. Osteoporosis, C. Osteochondritis, D. Osteomalacia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Osteopetrosis is known as Marble bone disease or Alber&;s Schonberg disease. In this condition bone is hard as marble or as brittle as chalks. There is continued new bone deposition on unresorbed calcified cailage and there is failure of remodelling. Reference- Maheshwari- 5th edn- pg no 317', 'role': 'assistant'}]