Consider the following two statements:
|The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter.
|Majority of this is contributed by the oceans as they occupy larger area of earth.
1. Both l and ll are correct and ll explains l
2. Both l and ll are correct but ll does not explain l
3. l is correct but ll is incorrect
4. l is incorrect but ll is correct