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
[{'content': 'Inguinal ligament is formed due to: \nSelect and explain. \nA. External oblique aponeurosis, B. Transversus abdominis, C. Internal oblique aponeurosis, D. Inguinal muscle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]