railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Knowledge Science Technology and Inventions
"Electric bulb" was invented by _______ and he was from _______.
1
Col. J. Schick, USA
2
J. Harrison and A. Catlin, England
3
Thomas Alva Edison, USA
4
Sir Humpherey Davy, England