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: Medicine
[{'content': 'Which of the following cause dysentery-a) Giardiasisb) Entaemoeba histolyticac) Balantidium colid) Cyclosporiasis \nSelect and explain. \nA. ac, B. bc, C. c, D. d', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]