This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
Nerve carrying motor component of light reflex- 
Select and explain. 
A. 1st nerve, B. 2nd nerve, C. 3rd nerve, D. 4th nerve
C: 3rd nerve
Answer: C: 3rd nerve 
Explanation: Efferent pathway consists of parasympathetic fibres which arise from the Edinger -Westphal nucleus in the midbrain and travel along the third cranial nerve .i.e, occulomotor nerve. Refer comprehensive ophthalmology (6th edition )A K Khurana, page no 315