This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diabetes Mellitus, Subject name: Medicine
All are sites of insulin administration except? 
Select and explain. 
A. Dorsum of hands, B. Arms, C. Lateral aspect of thigh, D. Around umbilicus
A: Dorsum of hands
Answer: A: Dorsum of hands 
Explanation: The preferred sites for insulin administration are: Abdomen Anterolateral aspect of thigh Dorsal Arm The route of administration is subcutaneous and abdominal wall has substantial subcutaneous fat. The site of injection can be rotated to prevent local site scarring. The rate of absorption from abdominal wall is fastest.