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
True about Giardia is 
Select and explain. 
A. May cause traveller's diarrhoea, B. Giardia inhabits ileum, C. Trophozoites are infective to man, D. None of the above
A: May cause traveller's diarrhoea
Answer: A: May cause traveller's diarrhoea 
Explanation: Giardia can cause traveller's diarrhea.
Other protozoal causes of traveller's diarrhea


Entamoeba histolytica
Cyclospora
Cryptosporidium


Giardia inhabits the proximal small intestine i..e, duodenum and upper jejunum (not ileum)


The infective stage for giardia infection is a cyst (not trophozoites).