Which element is essential for root hair growth?

Minerals associated with redox reactions are

Which element is required in large amounts in comparison to other micronutrients and is also a constituent of proteins involved in the transfer of electrons,such as ferredoxin and cytochromes?

Read the functions given below and identify the concerned nutrient.
$I.$ Activator of catalase
$II.$ Important constituent of cytochrome
$III.$ Important constituent of proteins involved in $ETS$
$IV.$ Essential for chlorophyll synthesis

Match Column-$I$ and Column-$II$.

Column-$I$	Column-$II$
$a$. To maintain the ribosome structure	$i$. Boron
$b$. The anion-cation balance in cells	$ii$. Magnesium
$c$. Carbohydrate translocation	$iii$. Chlorine
$d$. Constituent of vitamin biotin	$iv$. Potassium
	$v$. Sulphur

Sulfur is an important nutrient for the growth and productivity of which of the following crops?