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
[{'content': 'All of the following signs could result from infection within the right cavernous sinus, except: \nSelect and explain. \nA. Loss of pupillary light reflex, B. Loss of corneal blink reflex, C. Ptosis, D. Right ophthalmoplegia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Loss of corneal blink reflex', 'role': 'assistant'}]