This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
In rectus sheath which branch of aorta make anastomosis with superior epigastric artery - 
Select and explain. 
A. Subclavian artery, B. External iliac artery, C. Internal iliac artery, D. External carotid A
B: External iliac artery
Answer: B: External iliac artery 
Explanation: The superior epigastric artery is a branch of the internal thoracic artery and the inferior epigastric artery is a branch of the external iliac artery. Superior and inferior epigastric arteries anastomose in the rectus sheath.