Match Column 1 with Column 2: Column 1 Column 2 A. Ladybird i. Methan…

The correct answer is Option (2) → A-iii, B-iv, C-ii, D-i

(A) Ladybird — this matches (iii) Aphids. The ladybird is a red-and-black beetle that feeds on aphids, so it is used to get rid of them.

(B) Mycorrhiza — this matches (iv) Glomus. Many members of the genus Glomus form mycorrhiza with plant roots and pass phosphorus from the soil to the plant.

(C) Biological control — this matches (ii) Trichoderma. Trichoderma is a free-living fungus of the root ecosystem. It is an effective biocontrol agent of several plant pathogens.

(D) Biogas — this matches (i) Methanobacterium. This methanogen grows without oxygen on cellulosic material and produces methane, the main gas of biogas.

NCERT Extract:
Microbes in Production of Biogas – “… These bacteria are collectively called methanogens, and one such common bacterium is Methanobacterium.”
Microbes as Biocontrol Agents – “… The very familiar beetle with red and black markings – the Ladybird, and Dragonflies are useful to get rid of aphids and mosquitoes, respectively. … A biological control being developed for use in the treatment of plant disease is the fungus Trichoderma.”
Microbes as Biofertilisers – “… Fungi are also known to form symbiotic associations with plants (mycorrhiza). Many members of the genus Glomus form mycorrhiza. The fungal symbiont in these associations absorbs phosphorus from soil and passes it to the plant.”