1. Who invented Automatic rifle ?

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

2. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

3. Who invented Super Computer ?

Answer:

Seymour Cray

4. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

5. Who invented paper ?

Answer:

Cai Lun

6. Who invented Submarine ?

Answer:

John Philip Holland

7. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747