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': "True about Giardia is \nSelect and explain. \nA. May cause traveller's diarrhoea, B. Giardia inhabits ileum, C. Trophozoites are infective to man, D. None of the above", 'role': 'user'}, {'content': "Answer: A \nExplanation: Giardia can cause traveller's diarrhea.\nOther protozoal causes of traveller's diarrhea\n\n\nEntamoeba histolytica\nCyclospora\nCryptosporidium\n\n\nGiardia inhabits the proximal small intestine i..e, duodenum and upper jejunum (not ileum)\n\n\nThe infective stage for giardia infection is a cyst (not trophozoites).", 'role': 'assistant'}]