1. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

2. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

3. Who invented Vitamin A ?

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

4. Who invented Vitamin K ?

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

5. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

6. Who invented google ?

Answer:

Larry Page

7. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912