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: Unknown
[{'content': 'Traveller’s diarrhea is caused due to \nSelect and explain. \nA. Enterotoxigenic E. coil, B. Enterohemorrhagic E. coli, C. Enteropathogenic E. coli, D. Enteroinvasive E. coli', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Persons from developed countries visiting endemic areas often suffer from ETEC diarrhea—a condition known as Traveler’s diarrhea.', 'role': 'assistant'}]