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': 'A person has inability to look downward and laterally. The nerve injured is \nSelect and explain. \nA. Occulomotor, B. Trochlear, C. Abducent, D. Trigeminal', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Trochlear', 'role': 'assistant'}]