This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acoustic Neuroma, Subject name: ENT
[{'content': 'In acoustic neuroma, the earliest ocular finding is: \nSelect and explain. \nA. Diplopia, B. Ptosis, C. Loss of pupillary reflex, D. Loss of corneal reflex', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d (Loss of corneal reflex)Ref: Dhingra E.N.T. 3rd ed, p. 144 & 2nd ed, p. 116. 5th nerve is the earliest nerve to be involved. This leads to reduced corneal sensitivity and loss of corneal reflex.', 'role': 'assistant'}]