1. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

2. Who invented Ball-Point Pen ?

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

3. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

4. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

5. Who invented Vitamin K ?

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

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.