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': 'A 4-year-old presents with Labia lingual caries affecting\nonly maxillary incisors and involving molars\nThe diagnosis would be \nSelect and explain. \nA. Type I ECC, B. Type II ECC, C. Type III ECC, D. Rampant caries', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]