प्रथम भारतीय उपग्रह आर्यभट्ट को कब प्रक्षेपित किया गया था- 
When was the first Indian satellite Aryabhata launched?
  • 1

    1970

  • 2

    1973

  • 3

    1975

  • 4

    1976

Answer:- 3

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