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': 'HOME should be carried out for: \nSelect and explain. \nA. 1 minute., B. 20-30 sec., C. 10 sec., D. 15-20 sec.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]