Match the columns:
Column-$I$ Column-$II$
$(a)$ Ladybird $(1)$ Methanobacterium
$(b)$ Mycorrhiza $(2)$ Trichoderma
$(c)$ Biocontrol $(3)$ Aphids
$(d)$ Biogas $(4)$ Glomus

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(A) The correct matches are as follows:
$(a)$ Ladybird is a beetle used to control $(3)$ Aphids.
$(b)$ Mycorrhiza is a symbiotic association of fungi,such as $(4)$ Glomus,with plant roots.
$(c)$ Biocontrol agents include fungi like $(2)$ Trichoderma,which are used to treat plant diseases.
$(d)$ Biogas production involves methanogenic bacteria like $(1)$ Methanobacterium.
Therefore,the correct matching is $(a-3, b-4, c-2, d-1)$.

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Statement $R$: Photosynthetic microorganisms produce $H_2$,which are capable of converting solar energy into chemical energy.

Which one of the following pairs is not correctly matched?

Match the following columns and select the correct option.
Column-$I$Column-$II$
$(a)$ $LAB$$(i)$ Cattle feed
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Match the columns:
Column-$I$Column-$II$
$(a)$ Mycorrhiza$(1)$ Rhizobium
$(b)$ Bt$(2)$ Nucleopolyhedrovirus
$(c)$ Root nodules$(3)$ Phosphorus
$(d)$ Baculovirus$(4)$ Bt-Cotton

Which of the following pairs is incorrect?

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