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': "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 (EPEC), C. Entero-toxigenic E.coli (ETEC), D. Entero-aggregative E.coli (EAEC)", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Entero-toxigenic E.coli Entero-toxigenic E.coli is the most common cause of traveller's diarrhea. Other organisms causing travellers diarrhea are: Enteroaggregative E.coli - Vibrio cholerae Shigella - Rotavirus and Norwalk-like virus Salmonella - Entamoeba histolytica Compylobacter-jejuni - Giardia lamblia Aeromonas - Cryptosporidium Plesiomonas - Cyclospora", 'role': 'assistant'}]