<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 2-year-old boy is brought to the emergency department by his mother for evaluation of severe abdominal pain that began one hour ago. On examination, the patient is afebrile and has diffuse rebound tenderness with acute epigastric pain. A stool guaiac test is positive. A small bowel perforation is suspected. What is the embryologic structure that is the underlying cause of this patients presentation?? A: Vermiform appendix, B: Anal membrane, C: Fibrous cord remnant, D: Vitelline duct, E: Cloaca,  <response>: This is a question about the embryologic cause of a small bowel perforation in a 2-year-old boy with severe abdominal pain, fever, and a positive stool guaiac test. Based on the clinical presentation, a small bowel perforation is suspected. The choices list different embryologic structures, so the goal is to identify which one can cause a small bowel perforation in a young child. A vermiform appendix perforation would cause right lower quadrant pain. An anal membrane issue would not cause a bowel perforation. A fibrous cord remnant and a cloaca remnant would not be suspects in a small bowel perforation. A vitelline duct remnant is the most likely embryologic cause of a small bowel perforation in a young child.D: Vitelline duct 