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': 'Full mouth disinfection therapy aims at \nSelect and explain. \nA. Full mouth scaling within 24hours, B. Full mouth scaling within 48 hours, C. Quadrant wise scaling over 7-10 days, D. Five days of antibiotic therapy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]