This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': 'Oldest component of lens of the eye is \nSelect and explain. \nA. Anterior capsule, B. posterior capsule, C. Nucleo coical Junction, D. nucleus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nulceus is the oldest pa of lens Refer Khurana 6th edition pg no191', 'role': 'assistant'}]