Which of the following organisms does not fix $N_2$?

Match the following and choose the correct combination from the given options.

Column-$I$	Column-$II$
$(A)$ Potassium	$(1)$ Constituent of ferredoxin
$(B)$ Sulphur	$(2)$ Involved in stomatal movement
$(C)$ Molybdenum	$(3)$ Needed in the synthesis of auxin
$(D)$ Zinc	$(4)$ Component of nitrogenase

Phosphorus is required for making
$I.$ shell
$II.$ bones
$III.$ teeth
Choose the correct option

Match the following columns:

Column-$I$	Column-$II$
$(A)$ Water splitting reaction	$(1)$ Boron
$(B)$ Uptake and utilisation of $Ca^{2+}$	$(2)$ Copper
$(C)$ Synthesis of auxin	$(3)$ Chlorine
$(D)$ Redox reaction	$(4)$ Zinc

Statement $P$: In vertebrates,about $70$ percent of the total phosphorus is incorporated into bones and teeth.
Statement $Q$: Phosphorus is a structural component of vitamins like biotin and thiamine.

The soil organisms are