This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
[{'content': 'Ptosis results from trauma to which nerve - \nSelect and explain. \nA. VII, B. VIII, C. III, D. VI', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Oculomotor nerve injury causes paralysis of levator palpebrae superioris. In ptosis lid covers more than 2mm of cornea. Ref :Ak khurana 6th edition', 'role': 'assistant'}]