This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
The membranous pa of the atrioventricular pa of interventricular septum is between 
Select and explain. 
A. RA & LV, B. LA & RV, C. RA & RV, D. LA & LV
B: LA & RV
Answer: B: LA & RV 
Explanation: Inderbir Singh&;s Human embryology; Tenth edition; Pg 244The membranous pa of the interventricular septum is divisible into an anterior pa which separates the right and left ventricle and a posterior pa which separates the left ventricle from the right atrium ( also called interventricular septum).