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: Pediatrics
A most Common type of VSD – 
Select and explain. 
A. Membranous, B. Muscular, C. Multiple, D. None
A: Membranous
Answer: A: Membranous 
Explanation: Ventricular septal defect (VSD)

VSD is the most common congenital cardiac lesion.
VSD is a communication between two ventricles.
VSD may be located at : -


Membranous part of ventricular septum (most common → 90%)
Muscular septum
Maybe multiple