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': 'Largest cranial nerve is: \nSelect and explain. \nA. Trochlear, B. Trigeminal, C. Oculomotor, D. Vagus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Trigeminal', 'role': 'assistant'}]