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': 'Modern IOL is made up of –a) Acrylic acidb) PMMAc) PMLd) Silicone) Glass \nSelect and explain. \nA. abc, B. abd, C. bc, D. bde', 'role': 'user'}, {'content': 'Answer: B \nExplanation: IOL are made of (i) PMIVIA (rigid IOL); (ii) Silicon, acrylic, hydrogel, collamer (foldable IOL).', 'role': 'assistant'}]