This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
[{'content': 'Which nerve helps in looking laterally and downward: \nSelect and explain. \nA. Abducent, B. Trochlear, C. Trigeminal, D. Occulomotor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B TrochlearRef: Gray\'s, 41st ed. pg. 671* Superior oblique muscle is supplied by trochlear nerve.* Its actions are: aBB duct, Intort & Depress ("BID") eye in primary position.', 'role': 'assistant'}]