A baby is observed at birth to be noncyanotic. The mother is known to have been infected with rubella during pregnancy. On physical examination, the patient is found to have a continuous murmur that is present in both systole and diastoles. A nonsteroidal anti-infl ammatorydrug is prescribed, and on follow-up, the murmur has disappeared. Which of the following is the most likely congenital lesion? * A- Patent ductus arteriosus B- Tetralogy of Fallot C- Transposition of the great vessels D- Truncus arteriosus E- Ventricular septal defect