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': 'Which morphological type of cataract is most visually handicapping \nSelect and explain. \nA. Coical, B. Nuclear, C. Posterior subcapsular, D. Zonular', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Posterior subcapsular cataract is near the nodal point of the eye and hence decreases the vision mostly', 'role': 'assistant'}]