Most common ASD is ?: (A) Ostium primum, (B) Patent foramen ovale, (C) Ostium secondum, (D) Sinus venosus
Answer is C. Ans. is 'c' i.e., Osteum secondum ASD can occur in any poion of atrial septum - Secundum Primum Sinus venosus Absent atrial septum (leads to single atrium) Ostium secondum defect Defect in region of fossa ovalis Most common form of ASD