1. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

2. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

3. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented Submarine ?

Answer:

John Philip Holland

6. Who invented Vitamin A ?

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

7. Who invented Automatic rifle ?

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