1. Who invented Vitamin A ?

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

2. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

3. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

4. Who invented Automatic rifle ?

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

5. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

6. Who invented c language

Answer:

Dennis Ritchie

7. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.