31. Reaumur Thermometer was discovered by
32. Revolver discovered by
33. Landstrom invented
34. Elias Home invented
35. Vaccine for Small-Pox was discovered by
36. The Solar System was discoverd by
37. Stethoscope was invented by
38. Streptomycin was invented by
39. Bushwell invented
40. Who designed Suez Canal?
MCQ Multiple Choice Questions and Answers on Inventions and Discoveries
Inventions and Discoveries Trivia Questions and Answers PDF
Inventions and Discoveries Question and Answer
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