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 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 ophthalmopegia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Loss of corneal blink reflex', 'role': 'assistant'}]