system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most common ASD is ?
assistant
The correct answer is  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