In maize grains,the percentage of sulphur is approximately: (in $\%$)

Which of the following is a trace element?

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

Deficiency of micronutrients not only affects plant growth but also disrupts their specific functions,such as photosynthesis and mitochondrial electron transport. Which of the following groups of three minerals is involved in photosynthesis and mitochondrial electron transport?

For the growth of which of the following is sodium required?

Manganese competes with iron and magnesium for uptake and manganese also inhibits which element from translocating to the shoot apex?