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हवाई जहाज का विकास कब हुआ था? , When were airplanes developed?
When were airplanes developed?
A.
1980
1980
B.
1900
1900
C.
1970
1970
D.
1950
1950
Solution
B. 1900
Explanation
Airplanes were developed in the early year of 1900.
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