This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
Inguinal ligament is formed due to: 
Select and explain. 
A. External oblique aponeurosis, B. Transversus abdominis, C. Internal oblique aponeurosis, D. Inguinal muscle
A: External oblique aponeurosis
Answer: A: External oblique aponeurosis 
Explanation: Ans. A External oblique aponeurosis# Inguinal ligament is a fibrous, thickened, folded margin of the external oblique aponeurosis.# It extends from anterior superior iliac spine to pubic tubercle.