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: Surgery
[{'content': "The incision for drainage in ludwig's angina extends: \nSelect and explain. \nA. Up to the neck, B. To the angle of the mandible, C. Floor of mouth, D. All the above", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]