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': "A patient 18 years of age with sebaceous cysts on the scalp and back of the neck, an osteroma on the right mandible; Radiographs reveal multiple impacted supernumerary teeth in both jaws. These findings suggest \nSelect and explain. \nA. Cleidocranial dysostosis, B. Ectodermat dysplasia, C. Gardner's syndrome, D. Osteogenesis imperfecta", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]