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Inventions-General Knowledge questions and answers 31. Bushwell invented A. Atomic Bomb B. Submarine C. Urey D. Hovercraft 32. Stethoscope was invented by A. Bessemer B. Rane Laennec C. Henry Becquarrel D. none of these 33. Elias Home invented A. Steam boat B. T.N.T C. Sewing machine D. none of these 34. Pneumatic tyre was invented

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