Formation of The Heart

The correct answer is C.

Explanation:

The heart has a Taussig-Bing malformation, which is considered to be a variant of transposition of the great arteries because the aorta arises from the morphologic right ventricle.

In the "common pattern" of transposition (choice A), the aorta arises from a morphologic right ventricle on the right side of the heart, and the pulmonary artery arises from a morphologic left ventricle on the left side of the heart.

In the "corrected pattern" of transposition (choice B), the aorta arises from a morphologic right ventricle on the left side of the heart, and the pulmonary artery arises from a morphologic left ventricle on the right side of the heart.

In tetralogy of Fallot (choice D), the aorta overlies a septal defect, and the proximal pulmonary artery is stenotic.

In truncus arteriosus (choice E), a single large vessel overlies a ventricular septal defect.

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