1. Who invented Automatic rifle ?

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

2. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

3. Who invented Submarine ?

Answer:

John Philip Holland

4. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

5. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

6. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

7. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948