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
Traveller's diarrhoea is caused by: 
Select and explain. 
A. Shigella, B. E.Coli, C. E. histolytica, D. Giardiasis
B: E.Coli
Answer: B: E.Coli 
Explanation: Ans. is 'b' i.e. E. Coli Traveller's Diarrhoea is caused by all of the organism given in the Question . But the most common cause of traveller's diarrhoea is Enterotoxigenic strain of E. Coli.Other organisms causeing Traveller's Diarrhoea are:ShigellaSalmonellaYersiniaCampylobacterGiardiaEntamoeba histolytica