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Question

Select the pairs of sedimentary biogeochemical cycles.
I. Hydrogen cycle and water cycle
II. Phosphorus cycle and sulphur cycle
III. Calcium cycle and magnesium cycle
IV. Carbon cycle and nitrogen cycle

A
I and II
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B
II and III
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C
III and IV
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D
I and IV
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Solution

The correct option is B II and III
Biogeochemical cycles can be grouped into 2 types:
(i) Gaseous cycle: Material involved in circulation are gases or vapours and the reservoir pool is the atmosphere or hydrosphere, e.g., nitrogen, carbon, hydrogen, oxygen and water cycle.
(ii) Sedimentary cycle: Materials involved in circulation are non-gaseous and the reservoir pool is lithosphere, e.g., phosphorus, sulphur, calcium and magnesium cycle.
So, the correct answer is 'II and III'.

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