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': 'The standard sutureless cataract surgery is done with phacoemulsification and foldable IOL has an incision of – \nSelect and explain. \nA. 1mm–1.5mm, B. 2mm–2.5min, C. 3mm–3.5mm, D. 3.5mm–4.5mm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In phacoemulsification, the nucleus is emulsified using high frequency sound waves and then sucked out of the eye through a small (3.2 mm) incision.', 'role': 'assistant'}]