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: Anatomy
[{'content': 'Unilateral trigeminal N. injury is tested by : \nSelect and explain. \nA. Elevation and lowering of jaw, B. Inability to tense the jaw, C. Blinking of eye, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Elevation & Lowering of jaw', 'role': 'assistant'}]