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 classification of caries is based on the healing capacity of enamel and dentin? \nSelect and explain. \nA. GV Black, B. Baum, C. Finn modification of Black classification, D. Mount and Hume', 'role': 'user'}, {'content': 'Answer: D \nExplanation: It defines the site, extent and complexity of a cavity and stresses on conservative approach. Denoted by 2 numbers, first for site and\xa0second for extent. Determines the healing capacity of enamel. It is the basis of minimal intervention dentistry.\nSite 1 pits and fissures on posterior occlusal surfaces or smooth surfaces.\nSite 2 contact areas\nSite 3 cervical third of crown after recession and root surface\nSize 1 minimal dentinal involvement just beyond treatment by remineralization alone\nSize 2 moderate involvement of dentin following cavity preparation but enamel is sound and well supported.\nSize 3 large cavity with weakened structure, may fail under load. Restoration designed to support tooth\nSize 4\xa0extensive caries with bulk loss of tooth structure.\nTB of Operative Dentistry by Vimal Sikri 1 st ed., 130', 'role': 'assistant'}]