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: Pharmacology
All are preferred sites of insulin administration except? 
Select and explain. 
A. Buttocks, B. Thigh, C. Around the umbilicus, D. Upper arm
C: Around the umbilicus
Answer: C: Around the umbilicus 
Explanation: Insulin can be administered over any part of body covered by loose skin. Therefore it can be administered over abdomen except 2 inches around the abdomen.