1. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

2. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

3. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

4. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

5. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.