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': 'III nerve palsy causes all of the following except - \nSelect and explain. \nA. Ptosis, B. Mydriasis, C. Medial deviation of eyeball, D. Pupillary reflex lost', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Features of 3rd(occulomotor) nerve palsy\n\nParalysis of superior rectus, inferior rectus, medial rectus and inferior oblique. Eye is down and out due to unopposed action of superior oblique and lateral rectus. Medial & upward gaze is not possible.\nParalysis of sphinctor pupillae →\xa0Loss of ipsilateral direct and consensual pupillary light reflex and there is\n\tmydriasis.\nParalysis of ciliary muscle → Paralysis of accommodation.\nTwo extraocular muscles are spared :-\n\n\n\nSuperior oblique: - Intorsion, abduction and depression remain active.\nLateral rectus: - Abduction remains active. So eye is deviated lateraly.\n\nParalysis of levator palpabrae superioris → Ptosis', 'role': 'assistant'}]