A young female presents with history of dyspnoea on exertion

A young female presents with history of dyspnoea on exertion. On examination, she has wide, fixed split of S2 with ejection systolic murmur (III/VI) in left second intercostals space. Her EKG shows left axis deviation. The most probable diagnosis is :


1. Total anomalous pulmonary venous drainge.


2. Tricuspid atresia.


3. Ostium primum atrial septal defect.


4. Ventricular septal defect with pulmonary arterial hypertension.


Ans 3