1. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

2. Who invented Safety razor ?

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

3. Who invented Laser ?

Answer:

Charles H. Townes

4. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

5. Who invented Helicopter ?

Answer:

Igor Sikorsky

6. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

7. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805