Diarrhoea, cholera, typhoid are the diseases that have one thing in common, which is
A. all of them are air-borne
B. all of them are caused by a virus
C. all of them are caused by contaminated food and water
D. all of them cause headache
Answer:C
Diarrhoea, cholera, typhoid are the diseases that have one thing in common, which is
A. all of them are air-borne B. all of them are caused by a virus C. all of them are caused by contaminated food and water D. all of them cause headache