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': 'Foster Kennedy syndrome is - \nSelect and explain. \nA. I/L Papilloedema C/L optic atrophy, B. I/L Optic atrophy C/L papilloedema, C. I/L Optic atrophy and papilloedema, D. I/L Papilloedema C/L Papillitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]