General Knowledge
DISCOVERIES AND INVENTIONS MCQs
Scientists, Inventions & Discoveries
Total Questions : 949
| Page 4 of 95 pages
Answer: Option C. -> Television
Answer: Option D. -> Harmonium
Answer: Option B. -> Electric streetcar
Answer: Option A. -> The brake used in modern elevators
Answer: Option C. -> Automatic Telephone Exchanges
Answer: Option B. -> 1840s
Answer: Option B. -> The light a cat's eyes gave off on a fence