Ammonium sulphate is:

Assertion : Plants absorb sulphur in the form of sulphate ions.
Reason : Sulphur bacteria are required for the formation of sulphate.

Select the correct match for $X$ and $Y$.

Column $X$	Column $Y$
$(1)$ Magnesium	$(P)$ Blood clotting
$(2)$ Molybdenum	$(Q)$ Constituent of cysteine amino acid
$(3)$ Calcium	$(R)$ Essential for nitrogen fixation
$(4)$ Sulphur	$(S)$ Activation of enzymes

Nitrates of soil are also leached deep into the earth by . . . . . . .

Which of the following statements are incorrect?
$I.$ Hemoglobin,myoglobin,and cytochromes are iron-containing compounds.
$II.$ Copper is important for cell division in plants.
$III.$ Biotin and riboflavin are sulfur-containing vitamins.
$IV.$ Calcium is necessary for the structure of teeth and bones.
$V.$ Manganese is required in the structure of the phosphatase enzyme.

Identify the correct pair:

Column-$I$	Column-$II$
$P$. Phosphorus	$I$. Splitting of water to liberate oxygen during photosynthesis
$Q$. Potassium	$II$. Constituent of cell membranes and all nucleotides
$R$. Magnesium	$III$. In more abundant quantities in the meristematic tissue,buds,leaves,and root tips
$S$. Manganese	$IV$. Constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure

$P - Q - R - S$