Soap bubble attains spherical shape due to ______.

If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?

Which blood group is universal acceptor?

Photosynthesis takes place in the presence of chlorophyll and _________.

What is the name of the hormone produced by thymus gland?

The final boundary between the Earth and the outer space is called _____.

Which of the following region is covered by tropical evergreen forest?

Who is known as the 'Father of Indian Unrest'?