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': 'Nerve carrying motor component of light reflex \nSelect and explain. \nA. 3rd nerve, B. 1st nerve, C. 2nd nerve, D. 4thnerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Efferent pathway consists of parasympathetic fibres which arise from the Edinger -Westphal nucleus in the midbrain and travel along the third cranial nerve .\ni.e, occulomotor nerve.', 'role': 'assistant'}]