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: Surgery
First clinical feature of cerebello-pontine angle tumor is ? 
Select and explain. 
A. Reduced lacrimation, B. Loss of corneal reflex, C. Hoarseness of voice, D. Exaggerated tendon reflexes
B: Loss of corneal reflex
Answer: B: Loss of corneal reflex 
Explanation: Answer- B. Loss of corneal reflexAbsent corneal reflex is the earliest sign of cerebellopontine (CP) angle tumors like acoustic neuroma.