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
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 
Select and explain. 
A. Cleidocranial dysostosis, B. Ectodermat dysplasia, C. Gardner's syndrome, D. Osteogenesis imperfecta
C: Gardner's syndrome
Answer: C: Gardner's syndrome 
Explanation: None