What is dental caries and dental plaque? How can one avoid it?

How can one produce sound?

Answer the following questions : What is overloading? When does it occur? What does it cause ? How can overloading be avoided?

How can HIV be diagnosed?

What are real and virtual images ? How will you find out whether an image is real or virtual ? Can a virtual image be obtained on a screen ?

What will be the dental formula of a three year old child?

Dental formula shows.

Give the dental formula of human beings.

What is Marasmus? What are the causes and symptoms of marasmus? How it can be prevented?