1. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

2. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

3. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

4. Who invented Safety Pin ?

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

5. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

6. Who invented c language

Answer:

Dennis Ritchie

7. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912