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': 'NUVA SEAL is: \nSelect and explain. \nA. UV activated sealant, B. Self-cure sealant, C. Light cure sealant, D. Flouride releasing sealant', 'role': 'user'}, {'content': 'Answer: A \nExplanation: First Generation Sealants:\n\nPolymerized with UV light at a wavelength of 365 nm – cyanoacrylate based material.\nClassified as ‘accepted’ by ADA in 1976.\nEg: Alpha seal, Nuva Seal\n\nFailed due to:\n\nExcessively absorbed UV light-prevented complete polymerization of sealant at its depth.\nInconsistency of wavelength from the UV light source.\nThe potential for retinal damaged with long term exposure to UV light.', 'role': 'assistant'}]