1. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

2. Who invented paper ?

Answer:

Cai Lun

3. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

4. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

5. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

6. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

7. Who invented Vitamin K ?

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