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: Unknown
The floor of inguinal canal is formed by all except. 
Select and explain. 
A. Rectus adbominus, B. Inguinal ligament, C. Lacunar ligament, D. Iliopubic tract
A: Rectus adbominus
Answer: A: Rectus adbominus 
Explanation: To help define the boundaries, the canal is often further approximated as a box with six sides. Not including the two rings, the remaining four sides are usually called the "anterior wall", "posterior wall", "roof", and "floor".These consist of the following: