Persistent truncus arteriosus occurs due to

A Failure of conotruncal ridge to fuse
B Failure of descend of conotruncal ridge towards the ventricle
C Migration of neural crest cells towards truncal and bulbar ridges
D Aorticopulmonary septum following an oblique course
E Anterior displacement of aorticopulmonary septum

Correct Answer: Failure of conotruncal ridge to fuse, Failure of descend of conotruncal ridge towards the ventricle

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