1. Who invented HIV ?

Answer:

2. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

3. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

4. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

5. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

6. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

7. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany