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: Dental
[{'content': 'Alport syndrome is associated with defect in: \nSelect and explain. \nA. Type I collagen fibers, B. Type II collagen fibers, C. Type III collagen fibers, D. Type IV collagen fibers', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]