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
Oculomotor nerve palsy show all of the following except - 
Select and explain. 
A. Ptosis, B. Inability of lateral gaze, C. Paralysis of accommodation, D. Upward gaze not possible
B: Inability of lateral gaze
Answer: B: Inability of lateral gaze 
Explanation: Ans. is 'b' i.e., Inability of lateral gaze Features of 3rd (occulomotor) nerve palsy* Paralysis 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 8c upward gaze is not possible.* Paralysis of sphinctor pupillae - Loss of ipsilateral direct and consensual pupillary light reflex and there is mydriasis.* Paralysis of ciliary muscle - Paralysis of accommodation.* Two extraocular muscles are sparedi) Superior oblique :- Intorsion, abduction and depression remain active.ii) Lateral rectus :- Abduction remains active. So eye is deviated lateraly.* Paralysis of levator palpabrae superioris -> Ptosis.