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': 'Osteogenesis imperfecta is due to defect in? \nSelect and explain. \nA. Type I collagen, B. Type II collagen, C. Type II collagen, D. Type IV collagen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Osteogenesis imperfecta is due to qualitatively or quantitatively abnormal type I collagen.', 'role': 'assistant'}]