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
Most common ophthalmic affection of diphtheria is: 
Select and explain. 
A. Ptosis, B. Isolated ocular palsies, C. Total ophthalmoplegia, D. Ophthalmoplegia externa
B: Isolated ocular palsies
Answer: B: Isolated ocular palsies 
Explanation: Ans. Isolated ocular palsies