1. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

2. Who invented Piano ?

Answer:

Bartolomeo Cristofori

3. Who invented Calculus ?

Answer: Newton of Britain in 1670.

4. Who invented Helicopter ?

Answer:

Igor Sikorsky

5. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

6. Who invented google ?

Answer:

Larry Page

7. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.