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': 'In anesthetizing lower anteriors all of the following are indicated except \nSelect and explain. \nA. Fischer 123 technique, B. Classical inferior alveolar block, C. Mental nerve block, D. Incisive block', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]