14. 下列何者為最常見的先天性心臟病？
(A)心室中隔缺損 (ventricular septal defect, VSD)
(B)心房中隔缺損 (atrial septal defect, ASD)
(C)主動脈瓣狹窄 (aortic stenosis, AS)
(D)肺動脈瓣狹窄 (pulmonic stenosis, PS)

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統計： A(239), B(18), C(2), D(0), E(0) #1020945