A bаby wаs bоrn with persistent centrаl cyanоsis despite receiving high cоncentrations of O2 on high flow nasal cannula. An echocardiogram was performed and the baby was diagnosed with Tetrology of Fallot. What cardiac defects accounts for this anomaly?I. Right ventricular hypertrophyII. Overriding of the aortaIII. Aortic stenosisIV. Ventricular septal defect