Oxygen step up in the right ventricle – Cardiology MCQ

Oxygen step up in the right ventricle is seen in:
a) Patent ductus arteriosus (PDA) with pulmonary regurgitation (PR)
b) Rupture of sinus of Valsalva (RSOV) into left atrium (LA)
c) Sinus venosus atrial septal defect (ASD)
d) Cor Triatriatum
Please check the YouTube video above for the discussion