Question
As shown in the figure, abnormal subclavian artery develops as a result of:
A. Persistence of B
B. Persistence of A
C. Obliteration of A with persistence of B
D. Obliteration of B with persistence of A
Show Answer
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Correct Answer » D Explanation |
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Ans: D. Obliteration of B with persistence of A
(Ref Langman’s 13/e p206)
- Abnormal subclavian artery develops as a result of obliteration of B (4th arch) with persistence of A (distal portion of right dorsal aorta & 7th intersegmental artery).