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': 'Type of enamel which occurs near the cervical regions and the incisal and occlusal areas is: \nSelect and explain. \nA. Gnarled enamel., B. Hyperprismatic enamel., C. Hypoprismatic enamel., D. Hypercaclcified enamel', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]