1. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

2. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

3. Who invented Vitamin K ?

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

4. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

5. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

6. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

7. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist