1. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

2. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

3. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

4. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

5. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

6. Who invented Hydrogen bomb ?

Answer:

Edward Teller

7. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922