1. Who invented Vitamin A ?

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

2. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

3. Who invented c language

Answer:

Dennis Ritchie

4. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

5. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

6. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

7. Who invented Calculus ?

Answer: Newton of Britain in 1670.