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': 'Ectodermal dysplasia manifested as: \nSelect and explain. \nA. Hypohidrosis., B. Hypotrichosis., C. Hypodontia., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ectodermal dysplasia is characterized by congenital dysplasia of ectodermal structures, manifested as hypohidrosis (partial or complete absence of sweat glands) hypotrichosis and hypodontia or partial anodontia.', 'role': 'assistant'}]