This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enterobecteriaceae, Subject name: Microbiology
[{'content': "Most common strain of E.coli giving rise to traveller's diarrhea is - \nSelect and explain. \nA. Entero-invasive E.coli (EICE), B. Entero-pathogenic E.coli (EPE, C. Entero-toxigenic E.coli (ETEC), D. Entero-aggregative E.coli (EAEC)", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e.t Entero-toxigenic E.coli [Ref: Ananthanarayan 8th/e p. 276 & 7th/ep. 278;Harrison 18th/e p. 1087 table (128.3) & 17th/e p. 815Jo Entero-toxigenic E.coli is the most common cause of traveller's diarrhea.o Other organisms causing travellers diarrhea are:o Enteroaggregative E.colio Vibrio choleraeo Shigellao Rotavirus and Norwalk-like vineso Salmonellao Entamoeba histolyticao Compylobacter-jejunio Giardia lambliao Aeromonaso Cryptosporidiumo Plesiomonaso Cyclospora", 'role': 'assistant'}]