UPSC 2018 › Geography › Astronomy & Earth–Sun System

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UPSC 2018 · Q57 · Geography › Astronomy & Earth–Sun System · Save

Consider the following statements :

  1. The Earth’s magnetic field has reversed every few hundred thousand years.
  2. When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide.
  3. When living organisms originated, they modified the early atmosphere of the Earth.

Which of the statements given above is/are correct ?

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Show answer
Answer: (c) 1 and 3 only