<prompt> Inguinal ligament is formed due to:External oblique aponeurosisTransversus abdominisInternal oblique aponeurosisInguinal muscle  <response>: 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. 