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

Marine phytoplankton and photosynthetic bacteria produce about 50% of world's oxygen
Q. 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? (a) I and II (b) II only (c) I and III (d) None of the above statements is correct Correct Answer : (b) II only

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