This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cranial Nerves, Subject name: Anatomy
[{'content': 'Which cranial nerve is attached to dorsal surface of brainstem - \nSelect and explain. \nA. Facial, B. Trigeminal, C. Trochlear, D. Abducent', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Trochlear o Repeat from previous sessions.", 'role': 'assistant'}]