<prompt> The child shown below is suffering from a congenital hea disease. Which congenital hea defect is seen most commonly seen in these children?Patent ductus aeriosusAtrial septal defectAtrioventricular septal defectVentricular septal defect  <response>: This child is suffering from Down syndrome. Impoant must know facts about Down syndrome: - Trisomy 21 - MC - dt maternal meiotic non-dysjunction - Risk increase with increase in mothers age - QMc hea disease in Down syndrome - AVSD Atrioventricular septal defect aka Endocardial cushion defect 