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
All of the following are boundaries of Hesselbach's triangle except- 
Select and explain. 
A. Lacunar ligament, B. Inguinal ligament, C. Lateral border of rectus abdominis, D. Inferior epigastric artery
A: Lacunar ligament
Answer: A: Lacunar ligament 
Explanation: Ans. is 'a' i.e., Lacunar ligament Inguinal triangle of hesselbach* It is a peritoneal triangle in the posterior wall of the inguinal canal,* Boundariesi) Lateral- inferior epigastric arteryii) Medial-lateral border of rectus abdominisiii) Inferior- inguinal ligament* Direct inguinal hernia enters the inguinal canal through this triangle, which is divided by the obliterated umblical artery into a medial part (supravesical fossa) and a lateral part (medial inguinal fossa).