1. Who invented Vitamin K ?

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

2. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

3. Who invented Vitamin A ?

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

4. Who invented DNA Structure ?

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

5. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

6. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

7. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832