Teaching Odisha LTR Teacher Mock Test Series 2024-25 Computer Awareness Introduction to Computers

ਵੈਕਿਊਮ ਟਿਊਬ ਦੀ ਕਾਢ ਕਦੋਂ ਹੋਈ?

1
1900
2
1910
3
1880
4
1904
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