This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cataract, Subject name: Ophthalmology
[{'content': 'Nuclear cataract is associated with: \nSelect and explain. \nA. Index myopia, B. Index hypermetropia, C. Axial myopia, D. Axial hypermetropia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: NUCLEAR CATRACT', 'role': 'assistant'}]