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': 'Local anaeshthetics cannot be used at the site ofinfection because it causes - \nSelect and explain. \nA. Spread of infection, B. Lowered efficiency, C. Both, D. None', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Both Local infiltration is contraindicated near infection because it not only spreads the infection but is also ineffective, as the acidity produced by infection blocks the action of the drugs.", 'role': 'assistant'}]