Final answer:
The type of ventricular septal defect often linked with ventricular septal aneurysm is the perimembranous type, which is an abnormal opening located beneath the aortic valve extending into the membranous portion of the septum.
Step-by-step explanation:
The type of ventricular septal defect (VSD) most often associated with ventricular septal aneurysm is C. Perimembranous. A ventricular septal aneurysm occurs when a section of the ventricular septum bulges into an aneurysm, and this condition is commonly linked to perimembranous VSDs.
Perimembranous VSDs are characterized by an abnormal opening in the area of the interventricular septum that lies beneath the aortic valve and can extend into the membranous portion of the septum, making it susceptible to aneurysm formation.