Fundamentals of Physical Geography

Consider the following statements:

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

Which of the statements given above is/are correct?

1. (a)1 only
2. (b)2 and 3 only
3. (c)1 and 3 only
4. (d)1, 2 and 3

Which of the following are the evidences of the phenomenon of continental drift?

1. I.The belt of ancient rocks from Brazil coast matches with those from Western Africa.
2. II.The gold deposits of Ghana are derived from the Brazil plateau when the two continents lay side by side.
3. III.The Gondwana system of sediments from India is known to have its counterparts in six different landmasses of the Southern Hemisphere.

Select the correct answer using the code given below.

1. (a)I and III only
2. (b)I and II only
3. (c)I, II and III
4. (d)II and III only