(a) Gaseous nutrient cycle - Carbon and nitrogen
Sedimentary nutrient cycle - Sulphur and phosphorus
(b) Gaseous nutrient cycle - Carbon and sulphur
Sedimentary nutrient cycle - Nitrogen and phosphorus
(c) Gaseous nutrient cycle - Nitrogen and sulphur
Sedimentary nutrient cycle - Carbon and phosphorus
(d) Gaseous nutrient cycle - Sulphur and phosphorus
Sedimentary nutrient cycle - Carbon and nitrogen
[CBSE AIPMT 2015]
Correct Option (a) Reason : The biogeochemical cycles are of two types, i.e. gaseous cycles, in which the reservoir for the nutrient elements is in the atmosphere (air) or hydrosphere (water). The four most abundant elements in the living systems, i.e. hydrogen, carbon, oxygen and nitrogen have predominantly gaseous cycles.
In sedimentary cycles, the reservoir for the nutrient elements is in the sediments of the earth. Elements, such as phosphorus, sulphur, potassium and calcium have sedimentary cycles.