1. Who invented Vitamin D ?

Answer:

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

2. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

3. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

4. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

5. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented Stethoscope ?

Answer: Laennec of French in 1819.