This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'How to avoid lipodystrophy in diabetics? \nSelect and explain. \nA. Avoid insulin injection, B. Change injection sites, C. Give injection on same site, D. Give injection on alternate days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: By changing the injection site every day, the incidence of lipodystrophy can be reduced significantly. Ref: KD Tripathi 8th ed.', 'role': 'assistant'}]