question: Q:A 36-year-old man comes to the physician for a follow-up examination. Two weeks ago, he was diagnosed with an ischemic stroke of the right middle cerebral artery. He was treated with thrombolytics and does not have any residual symptoms. His pulse is 82/min and regular. Cardiovascular examination shows no abnormalities. Echocardiography shows a reproducible, transient, low-volume, right-to-left shunt through the atrial septum during coughing. Which of the following conditions is caused by failure of an embryologic process similar to that responsible for this patient's heart condition?? 
  {'A': 'Midgut volvulus', 'B': 'Transposition of the great vessels', 'C': 'Hirschsprung disease', 'D': 'Thyroglossal duct cyst', 'E': 'Hypospadias'},