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
The commonest cranial nerve palsy in tabes dorasalis is: 
Select and explain. 
A. III nerve, B. IV nerve, C. VI nerve, D. Total ophthalmoplegia
A: III nerve
Answer: A: III nerve 
Explanation: Ans. III nerve