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': 'Drug among the following causing cataract is \nSelect and explain. \nA. Amikacin, B. Dexamethasone, C. Chloramphenicol, D. Penicillin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Drugs causing cataract:i. Coicosteroidsii. Phenothiazines and other antipsychoticsiii. Topical mioticsiv. Amiodaronev. StatinsRef. Aravind FAQs in Ophthalmology(first edition) Pg-310', 'role': 'assistant'}]