Consider the following statements:
The Earth’s magnetic field has reversed every few hundred thousand years.
When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide.
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