This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower Extremity, Subject name: Anatomy
Safe quadrant of the gluteal region for intramuscular injection is: 
Select and explain. 
A. Upper and inner, B. Upper and outer, C. Lower and inner, D. Lower and outer
B: Upper and outer
Answer: B: Upper and outer 
Explanation: Ans. B. Upper and outerThe gluteus maximus is the main extensor muscle of the hip. It is the largest and most superficial of the three gluteal muscles. The intramuscular injection is administered into the gluteus maximus muscle in the buttock. The upper outer quadrant of this area must be used to avoid any damage to the sciatic nerve.