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
Which of the following sites is least commonly preferred for insulin injection? 
Select and explain. 
A. Anterior thigh, B. Lateral thigh, C. Dorsum of arm, D. Around umbilicus
B: Lateral thigh
Answer: B: Lateral thigh 
Explanation: Ans: B. Lateral thigh(Ref Goodman Gilman 12/e p1252)Insulin injection:Usually injected into subcutaneous tissues of abdomen, buttock, anterior thigh, or dorsal arm.Absorption most rapid from abdominal wall, followed by arm, buttock & thigh.