This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Most common complication of Shigellosis \nSelect and explain. \nA. HUS, B. Reactive arthritis, C. Pneumonia, D. Meningitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) HUS # EXTRAINTESTINAL COMPLICATIONS OF SHIGELLOSIS:> Common complications: Bacteremia HUS: occur with S. dysenteriae type 1 infection. Manifestations of HUS usually develop at end of first week of shigellosis. Oliguria, marked drop in hematocrit are the first signs & progress to anuria with renal failure & to severe anemia with congestive heart failure.> Less common complications: Reactive arthritis> Rare complications: Pneumonia; Meningitis; Vaginitis (in prepubertal girls); Keratoconjunctivitis & "rose spot" rashes.', 'role': 'assistant'}]