Nitrate present in the soil is reduced to nitrogen by the process of denitrification. Which bacteria are responsible for denitrification?

Match the following columns correctly:

Column $I$	Column $II$
$(a)$ Manganese	$(p)$ For $O_2$ evolution
$(b)$ Chlorine	$(q)$ Required for thyroid gland development
$(c)$ Phosphorus	$(r)$ High concentration in mitochondria
$(d)$ Iodine	$(s)$ Component of nucleic acids

Ammonium sulphate is:

Select the correct option for the following matches:

$(1)$ For healthy growth of plants	$(a)$ Nitrogen
$(2)$ As a part of vitamins	$(b)$ Manganese
$(3)$ In enzymes associated with fat metabolism	$(c)$ Cobalt
$(4)$ For the activity of phosphatase enzyme	$(d)$ Magnesium

Given below are two statements:
Statement $I$: Diazotrophs are the nitrogen-fixing microorganisms,which are exclusively symbiotic.
Statement $II$: Organic fertilizers include farmyard manure,compost,and green manure.
In light of the above statements,choose the most appropriate answer from the options given below.

Nitrogen is required mainly by which of the following parts of the plants?
$I.$ Meristematic tissues
$II.$ Differentiating tissues
$III.$ Apical tissues
$IV.$ Metabolically active cells
Choose the correct option.