This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
[{'content': 'All are true about Achondroplasia except \nSelect and explain. \nA. Antosomal dominant, B. Acral osteolysis, C. Trident hand, D. Champaigne glass pelvis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]