1. Who invented Automatic rifle ?

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

2. Who invented paper ?

Answer:

Cai Lun

3. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented Hydrogen bomb ?

Answer:

Edward Teller

6. Who invented Floppy disk ?

Answer: IBM in 1970

7. Who invented Vitamin A ?

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