Solved UPSC CDS/OTA Question
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Q · Rocks and Rock CycleMedium · 45s
Which of these can be both organic and inorganic in origin?
TopicRocks and Rock Cycle
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Limestone may form from shells (organic) or chemical precipitation (inorganic).
Final Answer: Option C — Limestone