1. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

2. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

3. Who invented Java Language ?

Answer:

James Gosling

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

6. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

7. Who invented HIV ?

Answer: