1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

3. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

4. Who invented Vitamin A ?

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

5. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

6. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

7. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.