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
[{'content': 'All are preferred sites of insulin administration except? \nSelect and explain. \nA. Buttocks, B. Thigh, C. Around the umbilicus, D. Upper arm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]