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
Type of enamel which occurs near the cervical regions and the incisal and occlusal areas is: 
Select and explain. 
A. Gnarled enamel., B. Hyperprismatic enamel., C. Hypoprismatic enamel., D. Hypercaclcified enamel
D: Hypercaclcified enamel
Answer: D: Hypercaclcified enamel 
Explanation: None