question: Q:A mother brings her 2-year-old son to the pediatrician following an episode of abdominal pain and bloody stool. The child has otherwise been healthy and growing normally. On physical exam, the patient is irritable with guarding of the right lower quadrant of the abdomen. Based on clinical suspicion, pertechnetate scintigraphy demonstrates increased uptake in the right lower abdomen. Which of the following embryologic structures is associated with this patient’s condition?? 
  {'A': 'Metanephric mesenchyme', 'B': 'Ductus arteriosus', 'C': 'Vitelline duct', 'D': 'Paramesonephric duct', 'E': 'Allantois'},