1. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

2. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

3. Who invented Vitamin K ?

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

4. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

5. Who invented Radiocarbon ?

Answer:

Willard Libby

6. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

7. Who invented Vitamin A ?

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