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': "Bilateral centrocaecal scotoma more marked with red than white colour is a feature of: \nSelect and explain. \nA. Tobacco amblyopia, B. Leber's disease, C. Papilledema, D. Quinine amblyopiafs", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Tobacco amblyopia', 'role': 'assistant'}]