1. Who invented Vitamin K ?

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

2. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

3. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

4. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

5. Who invented Helicopter ?

Answer:

Igor Sikorsky

6. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

7. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504