inventions mcq questions and answers for competitive exams UPSC SSC , SSC CGL, upsc Civils , Entrance exams Online test practice online free Quiz, mock practice online
63.
Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?
69.
First automobile powered by an internal combustion engine that is fuelled by hydrogen is invented in
Rate This:
5.0 / 5 - 1 votes