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': 'An example for primary prevention of dental diseases is: \nSelect and explain. \nA. Scaling & polishing and filling, B. Extractions, RCT and periodontal surgeries, C. Wearing gloves and sterilization of the instruments, D. Replacements of Lost teeth and orthodontic treatments', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]