Q.Aquaponics is a technique which is
a. A combination of aquaculture and fish culture
b. A combination of aquaculture and hydroponics
c. A combination of vermiculture and hydroponics
d. A combination of aquaculture and prawn culture.

Aquaponics combines aquaculture (growing fish) with hydroponics (growing plants in nutrient-laden water instead of soil) into a single recycling system that helps prevent toxic water runoff and keeps ecosystem balance by reusing the fish's own waste and excretory products; India adopted the technique in 2013. Four primary methods are used: deep water (raft-based) culture for larger commercial systems and fast-growing plants; media-based culture (using clay pellets or shale) for home/hobby-scale setups growing a wide range of fruiting plants, greens and herbs; the Nutrient Film Technique, which passes nutrient-rich water through a narrow trough or pipe past suspended plant roots; and Aqua vertica (vertical aquaponics), which stacks plants in a tower fed from the top, suited to leafy greens and straw …