Simplify the following expression: 84 - [21 - {14

Which planet in our solar system has no atmosphere at all? 

Consider the following statements about Vyommitra: 

What are the small, hair-like structures in the upper part of the respiratory tract called?

Ebola disease is caused by which of the following?

Consider the following statements about Flying Wing Technology Demonstrator:

D.N.A. does not contain

Who predicted the existence of the plunging region around black holes?

Which enzyme is pivotal in blood clotting?

100 gram of ice at 0°C is mixed with 100 gram of water at 80°C. What will be the final temperature of the mixture?

Who is elected as the new President of the country South Korea?