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Railways PYQCBT 1 2016

RRB NTPC · Question 9

_____ was the first satellite launched by the U.S in 1958. A. Sputnik 1 B. Apollo 11 C. GSAT D. Explorer 1

  1. A

  2. C

  3. B

  4. D

Show answer & explanation

Answer: (D) D

Explanation

Explorer 1, launched on 31 January 1958, was the first US satellite; it discovered the Van Allen radiation belts.