Which element is essential for the growth of the pollen tube?

The deficiencies of micronutrients not only affect the growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below,which group of three elements shall affect most,both photosynthetic and mitochondrial electron transport?

Match the following columns:

Column-$I$	Column-$II$
$P$. $Mg^{2+}$	$I$. Rubisco and $PEPcase$
$Q$. $Zn^{2+}$	$II$. Alcohol dehydrogenase
$R$. $Mo$	$III$. Nitrogenase

Which mineral element is primarily found in the bones and teeth of living organisms?

Match the following.

Column-$I$	Column-$II$
$(a)$ Nitrogen	$(1)$ Activation of some enzymes
$(b)$ Potassium	$(2)$ For the work done by $F_1$
$(c)$ Phosphorus	$(3)$ Ionic balance
$(d)$ Calcium	$(4)$ In structure of vitamin

Which of the following sets contains only macronutrients?