1. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

2. Who invented Piano ?

Answer:

Bartolomeo Cristofori

3. Who invented Vitamin A ?

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

4. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

5. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

6. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

7. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.