1. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

2. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

3. Who invented Printing Press ?

Answer:

Johannes Gutenberg

4. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

5. Who invented Calculus ?

Answer: Newton of Britain in 1670.

6. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

7. Who invented Laptop ?

Answer:

Adam Osborne in 1981.