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': "Amaurosis fugax may occur in all of the following conditions except: \nSelect and explain. \nA. Papilloedema, B. Papillitis, C. Giant cell aeritis, D. Raynaud's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Papillitis', 'role': 'assistant'}]