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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 the earth?
This question appeared in the MNPSC Prelims 2010 examination (GS). It is Question 62 out of 200 questions in this paper.
This question was part of the MNPSC Prelims 2010 (GS). The MNPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all MNPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.