पोषक चक्र जो कभी -कभी पत्थर� – McqOptions

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1.	पोषक चक्र जो कभी -कभी पत्थरो के अपक्षय से प्रभावित होता है -
A.	कार्बन चक्र
B.	नाइट्रोजन चक्र
C.	फास्फोरस चक्र
D.	उपरोक्त सभी चक्र
Answer» D. उपरोक्त सभी चक्र

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