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': 'Maximum incidence of developmental defects is seen in: \nSelect and explain. \nA. Primary incisor, B. Permanent incisors, C. Permanent mandibular first molar, D. Primary mandibular second molar', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Maximum incidence of developmental defects is seen in permanent incisors.', 'role': 'assistant'}]