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सामान्य ज्ञान
: आविष्कार
हेलिकॉप्टर का आविष्कार किसने किया? , Who invented the helicopter?
हेलिकॉप्टर का आविष्कार किसने किया?
Who invented the helicopter?
A. कोपरनिकस (Copernicus)
B. सिकोस्र्की (Sikovsky)
C. कॉकरेल (Cockerel)
D. ड्रिंकर (drinker)
Correct Answer :
B. सिकोस्र्की
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