1. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

2. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

3. Who invented Vitamin K ?

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

4. Who invented Calculus ?

Answer: Newton of Britain in 1670.

5. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented HIV ?

Answer: