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: Pathology
[{'content': "Narrow, high arches palate, prolonged retention of decidous teeth and failure in the eruption of permanent teeth are characteristic of: \nSelect and explain. \nA. Cherubim., B. Cleidocranial dysplasia., C. Paget's disease., D. Marfan syndrome.", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]