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: Medicine
[{'content': 'Aldose reductase inhibitor drugs are useful in \nSelect and explain. \nA. Cataract, B. Diabetes mellitus, C. Hereditary fructose intolerance, D. Essential fructosuria', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Diabetes mellitus Aldose reductase catalyzes the NADPH-dependent conversion of glucose to sorbitol, the first step in polyol pathway of glucose metabolism. Aldose reductase inhibitors are a class of drugs being studied as a way to prevent eye and nerve damage in people with diabetes mellitus. Examples of aldose reductase inhibitors include: Tolrestat (withdrawn from market) Apalrestat Ranirestat Fidarestat", 'role': 'assistant'}]