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
An optic nerve injury may result in all of the following except: 
Select and explain. 
A. Loss of vision in that eye, B. Dilatation of pupil, C. Ptosis, D. Loss of light reflex
C: Ptosis
Answer: C: Ptosis 
Explanation: Ans. Ptosis