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': 'Cataract is cases of diabetes mellitus is due to accumulation of - \nSelect and explain. \nA. Glycated crytallins, B. Calcified crystallins, C. Glycated fibrillins, D. Calcified fibrillins', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In diabetic cataract the mechanisms are belived to be glycation, carbamylation of crystallins and increased oxidative damage. IMG REF', 'role': 'assistant'}]