1. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

2. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

3. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

4. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

5. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

6. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

7. Who invented Calculus ?

Answer: Newton of Britain in 1670.