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: ENT
In acoustic neuroma, the earliest ocular finding is - 
Select and explain. 
A. Diplopia, B. Ptosis, C. Loss of pupillary reflex, D. Loss of corneal reflex
D: Loss of corneal reflex
Answer: D: Loss of corneal reflex 
Explanation: Earliest nerve involved by acoustic neuroma - Vth nerve/trigeminal nerve.
The earliest manifestation of Vth nerve involvement is decreased corneal sensitivity leading to loss of corneal reflex.