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': 'Shell teeth are more common in this variant of dentinogenesis imperfecta \nSelect and explain. \nA. Type I, B. Type III, C. Type II, D. Type III and I', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]