1. Who invented Vitamin K ?

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

2. Who invented Automatic rifle ?

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

3. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

4. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

5. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented Piano ?

Answer:

Bartolomeo Cristofori