True About ostium premium ASD: (A) Results in right axis detion(RAD) on the ECG, (B) Is seen in Holt-Oram syndrome, (C) Less common form than secundum ASD, (D) May be left to close spontaneously
Answer is C. Ostium secondum defects are the most common type of ASD, and they are seen in Holt-Oram syndrome.