A newborn child is being evaluated by echocardiography for a suspected congenital heart defect. During the procedure the technologist identifies flow between the left atrium and the right atrium. Of the following forms of congenital heart disease, which is the infant most likely to have? a) Tetralogy of Fallot

b) Ductus arteriosus

c) Totally anomalous pulmonary venous return

d) Ebstein anomaly

e) Membranous ventricular septal defect