Important Inventions and Discoveries in World » Exercise – 1
89. Who invented Bifocal Lens?
(a) Alfred B. Nobel
(b) Thomas Alva Edison
(c) Benjamin Franklin
(d) Rudolf Diesel
| Subject Name : General Knowledge |
| Exam Name : UPSC, SSC, KVS, NVS, IBPS, RBI, SBI, RRB |
| Posts Name : Post Graduate Teacher, College Lecturer, Officer, Office Assistant, Clerk |
| General Knowledge Books |
Related Posts
Important Inventions and Discoveries in World » Exercise - 188. Who invented Dynamite? (a) Sir Alexander Graham Bell (b) Benjamin Franklin (c) Thomas Alva Edison (d) Alfred B. Nobel- Important Inventions and Discoveries in World » Exercise - 113. When were blue jeans invented? (a) 1900s (b) 1860s (c) 1870s (d) 1850s
- Important Inventions and Discoveries in World » Exercise - 164. When was the game Frisbee invented? (a) 1920s (b) 1900s (c) 1870s (d) 1890s
- Important Inventions and Discoveries in World » Exercise - 138. In which decade was the transistor invented? (a) 1940s (b) 1950s (c) 1960s (d) 1980s
- Important Inventions and Discoveries in World » Exercise - 168. When was the first elevator built? (a) 1743 (b) 1739 (c) 1760 (d) 1785