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': 'Which of the following type of PRR requires local anesthesia and liner? \nSelect and explain. \nA. Type A, B. Type B, C. Type C, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: TYPES OF PRR\nBased on the extent and depth of the carious lesions:\na) Type A - Suspicious pits and fissures where caries\xa0removal is limited to\xa0enamel.\nb) Type B - Incipient lesion in dentin that is small and confined.\nc) Type C - Characterized by the need for greater expIoratory preparation in dentin.\nKey concept\nType C\n\nGreater exploratory preparation of dentin.\xa0\nRequires LA.\nRequires placement of a liner like calcium hydroxide or GIC over the exposed dentin.', 'role': 'assistant'}]