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': 'Not seen in osteopetrosis - \nSelect and explain. \nA. Compression of cranial nerve, B. Osteomyelitis mandible, C. Pancytopenia, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Osteopetrosis also known as marble bone disease/Alber&;s-Schonberg disease which is transmitted as autosomal dominant or in severe case as autosomal recessive, is characterised by dense and brittle bones, anemia, jaw osteomyelitis and cranial nerve palsies. Disease is due to functional deficiency of osteoclast leading to failure of bone resorption. Reference-Essential ohopaedics- Maheshwari-5th edn-pg no 317', 'role': 'assistant'}]