Question:
What is the most common conotruncal anomaly?
What is the most common conotruncal anomaly?
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Among outflow-tract (conotruncal) defects, transposition of the great arteries tops this list.
Updated On: Jun 24, 2026
- TGA
- Tetralogy of Fallot
- Truncus arteriosus
- Double outlet right ventricle
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The Correct Option is A
Solution and Explanation
Step 1: Define conotruncal defects. Conotruncal anomalies are abnormalities of outflow tract septation or of ectomesenchymal (neural crest) tissue migration. They include transposition of the great arteries, tetralogy of Fallot, truncus arteriosus, and double outlet right ventricle.
Step 2: Identify the commonest. Among the conotruncal group, the most common defect is transposition of the great arteries (TGA). So TGA is the answer.
Step 3: Why the other options are not chosen. Tetralogy of Fallot, truncus arteriosus, and double outlet right ventricle are all conotruncal anomalies, but in this recall TGA is listed as the most common one.
Step 2: Identify the commonest. Among the conotruncal group, the most common defect is transposition of the great arteries (TGA). So TGA is the answer.
Step 3: Why the other options are not chosen. Tetralogy of Fallot, truncus arteriosus, and double outlet right ventricle are all conotruncal anomalies, but in this recall TGA is listed as the most common one.
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