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': 'The laser useful in smear layer removal is \nSelect and explain. \nA. Er:Cr:YSGG, B. Er:YAG, C. Ne:YAG, D. Argon Laser', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Erbium: Chromium: Yttrium Scandium Gallium Garnet Laser (Er:Cr:YSGG)\n\nEtches enamel surface.\nRemoval smear layer.\n\n\xa0Erbium:\xa0Yttrium\xa0Aluminium\xa0Garnet\xa0Laser (Er:YAG)\n\nRemove caries in enamel and dentin.\nRemoves dislodged GIC and Composite.\xa0\nDesensitize the hypersensitivity dentin.\n\n\xa0Neodymium -\xa0Yttrium\xa0Aluminum\xa0Garnet\xa0Laser (Ne: YAG)\xa0\xa0\n\nGood hemostasis.\nUsed in non-surgical sulcular debridement.\n\n\xa0Argon Laser\xa0\n\nYield high intensity visible blue light.\xa0\nCuring of dental restorations.\nIt also changes the surface chemistry of both enamel and\xa0root\xa0surfaces\xa0dentin, which\xa0reduces\xa0the probability of recurrent caries.\xa0\nRemoves extrinsic and intrinsic stains.\nBleaching of teeth.', 'role': 'assistant'}]