This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Helminthology, Subject name: Microbiology
[{'content': 'Infection with colitis is caused by: \nSelect and explain. \nA. Enterobius vermicularis, B. Trichuris trichiura, C. Strongyloides, D. Clonorchis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Trichuris trichiura.a. Trichuriasis is associated with colitis. It can also cause rectal prolapse,b. Enterobius vermicularis causes perineal pruritus or enuresis,c. Strongyloides localizes in the upper small intestines,d. Clonorchis localizes in the biliary tract.', 'role': 'assistant'}]