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': 'A bilateral mandibular block \nSelect and explain. \nA. Is dangerous because patient may swallow tongue, B. Will lead to space infection, C. Is not contraindicated, D. Should rarely be performed', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]