FA 2016, p.263:Failure of spiralization. Its basically the spiral orientation of the aorticopulmonary septum which causes the aorta to arise from the left ventricle even though it is anatomically located to the right of the pulmonary trunk.
I assume, you're talking about a UWorld question. And what was the correct answer to that question?FA 2016, p.263:
Conotruncal abnormalities associated with
failure of neural crest cells to migrate:
ƒ Transposition of great vessels.
ƒ Tetralogy of Fallot.
ƒ Persistent truncus arteriosus.
I saw a question that had both answers,
failure of spiralization and failure of migration.