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': 'Most common GI manifestation in HIV infection is \nSelect and explain. \nA. Amebiasis, B. Cryptosoporidiosis, C. Giaridiasis, D. Hook Worm infestation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]