1. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

2. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

3. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

4. Who invented DNA Structure ?

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

5. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

6. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

7. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903