No urination due to shortage of water in the body is a typical symptom of

• typhoid

• malaria

• dysentery

• cholera

Which one of the following is an unhealthy habit?  

• Removing wax from inside the ears 

•  Keeping the mouth closed while breathing 

• Sleeping for only 6-7 hours

• Sharing towels with others 

The protozoan that causes malaria is: 

• The protozoan that causes malaria is: 

• Euglena 

• Paramecium 

• Plasmodium 

The chemical substance mainly responsible for tooth disorders is 

• Calcium

• Chloride 

• Fluorides 

•  Iodides