1. Who invented Vitamin D ?

Answer:

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

2. Who invented Laser ?

Answer:

Charles H. Townes

3. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

4. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

5. Who invented Vitamin A ?

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

6. Who invented Vitamin K ?

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

7. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.