1. Who invented DNA Structure ?

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

2. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

3. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

4. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

5. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented Floppy disk ?

Answer: IBM in 1970