1. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

2. Who invented Piano ?

Answer:

Bartolomeo Cristofori

3. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

4. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

5. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

6. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

7. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903