Which of the following is not a biofertilizer?

Identify the correct statements regarding mycorrhiza:
$(1)$ Many members of the genus $Glomus$ form mycorrhiza.
$(2)$ It is responsible for all mineral absorption from the soil.
$(3)$ Such associations show benefits against drought and salinity in plants.
$(4)$ Mycorrhiza is a symbiotic association between fungi and roots of higher plants.

Which of the following statements is incorrect?

Which one of the following is not a biofertiliser?

Which of the following pairs is correct for biofertilizers?

What is the primary function of biofertilizers?