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: Ophthalmology
[{'content': 'Superior oblique is supplied by - \nSelect and explain. \nA. Upper branch of 3rd N, B. Lower branch of 3rd N, C. Trochlear, D. Abducens', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]