1. Who invented Automatic rifle ?

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

2. Who invented Proton ?

Answer:

Ernest Rutherford

3. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

4. Who invented Vitamin K ?

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

5. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented c language

Answer:

Dennis Ritchie