With reference to the planet Earth, consider the following statements:

I. Rain forests produce more oxygen than that produced by oceans.

II. Marine phytoplankton and photosynthetic bacteria produce about 50% of world's oxygen.

III. Well-oxygenated surface water contains several folds higher oxygen than that in atmospheric air.

Which of the statements given above is/are correct?

1. (a) I and II
2. (b) II onlyCorrect answer
3. (c) I and III
4. (d) None of the above statements is correct

Answer: (b)