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': 'A child patient suspected of leukemia is suffering from\nperiapical abscess line of treatment is \nSelect and explain. \nA. Endodontic therapy, B. Extraction of the involved tooth, C. Obtain a blood count before extraction, D. Obtain medical consultation before treatment', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]