Who invented the contact lens?
1). Enrico Fermi
2). Adolf Gaston Eugen Fick
3). Sandford Fleming
4). Benoit Fourneyron
2. What did J. B. Dunlop invent?
3. Who discovered Circulatory System?
4. Piano was invented by ________.
5. Electric chair was invented by
6. What was invented by J. B. Dunlop?
7. Who was the invertor of frozen foods?
8. Postage Meter was invented by
10. Who among the following devised the technique IVF (In vitro Fertilization)?