1. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

2. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

3. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

4. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

5. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

6. Who invented paper ?

Answer:

Cai Lun

7. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.