General Knowledge
DISCOVERIES AND INVENTIONS MCQs
Scientists, Inventions & Discoveries
Total Questions : 949
| Page 2 of 95 pages
Answer: Option D. -> There is no sure date
Answer: Option B. -> Remote control
Answer: Option A. -> Bifocal spectacles
Answer: Option A. -> Steve McQueen
Answer: Option D. -> Play-Doh
Answer: Option D. -> Mary Kies
Answer: Option C. -> Waterbed
Answer: Option A. -> Robert Oppenheimer