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
How to avoid lipodystrophy in diabetics? 
Select and explain. 
A. Avoid insulin injection, B. Change injection sites, C. Give injection on same site, D. Give injection on alternate days
B: Change injection sites
Answer: B: Change injection sites 
Explanation: By changing the injection site every day, the incidence of lipodystrophy can be reduced significantly. Ref: KD Tripathi 8th ed.