This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional  Disease, Subject name: Orthopaedics
[{'content': "Albers schonberg disease is also known as - \nSelect and explain. \nA. Osteoprosis, B. Osteopetrosis, C. OI, D. Paget's disease", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Osteopetrosis o Osteopetrosis is also known as Marble bone disease or Albers-Schonberg disease.o Paget's disease is known as Osteitis deformans,o Osteogenesis imperfecta is known as Brittle bone disease,o Osteoporosis is known as Fragile bone disease.", 'role': 'assistant'}]