1. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

2. Who invented Vitamin D ?

Answer:

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

3. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

4. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

5. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

6. Who invented paper ?

Answer:

Cai Lun

7. Who invented Laser ?

Answer:

Charles H. Townes