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
[{'content': 'A patient presented with normal eyesight and absence of direct and consensual light reflexes in left eye. Which of the following cranial nerves is suspected to be lesioned? \nSelect and explain. \nA. Occulomotor, B. Trochlear, C. Optic, D. Abducent', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) OculomotorRef: Kanski 7/e, p. 815In complete optic nerve lesion of one side (afferent pupillary defect)The ipsilateral direct reflex is absentThe contralateral consensual reflex is absentIn oculomotor nerve lesion of one side (efferent pupillary defect)The ipsilateral direct reflex is absentThe ipsilateral consensual reflex is absent', 'role': 'assistant'}]