This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Which of the following is the causative organism of acute mesenteric lymphadenitis? \nSelect and explain. \nA. E-Coli, B. V-Cholera, C. Hemophilus, D. Yersinia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Acute mesenteric lymphadenitis is caused by Yersinia enterocolitica or Yersinia pseudotuberculosis. It can also cause ileitis, colitis and acute appendicitis. Acute mesentric lymphadenitis is often confused with acute appendicitis in children. Reference: Schwaz's Principles of Surgery, 9e chapter 30.", 'role': 'assistant'}]