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Consider the following:
1. Photosynthesis
2. Respiration
3. Decay of organic matter
4. Volcanic action
Which of the above add carbon dioxide to the carbon cycle on Earth? UPSC 2011 (CS-P)
1 and 4 only
2 and 3 only
2, 3 and 4 only
1, 2, 3 and 4
Read Solution (Total 1)
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- 2 3 4 only
- 8 years agoHelpfull: Yes(0) No(0)
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