1. Who invented Vitamin D ?

Answer:

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

2. Who invented Helicopter ?

Answer:

Igor Sikorsky

3. Who invented Radiocarbon ?

Answer:

Willard Libby

4. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

5. Who invented by Electric Lamp ?

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

6. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

7. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.