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': 'Best site for IOL implantation - \nSelect and explain. \nA. Iris, B. Capsular bag, C. Anterior chamber, D. Sulcus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In the capsular bag fixation of IOL is the most ideal method. In the ciliary sulcus fixation of IOL is done in the absence of intact capsular bag with adequate capsular suppo. Scleral fixation of IOL is done in the absence of capsular suppo. REF IMG : The above image shows a three piece implantation in the bag', 'role': 'assistant'}]