1. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

2. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

3. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

4. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

5. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

6. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

7. Who invented Floppy disk ?

Answer: IBM in 1970