Special modes of nutrition Questions in English

(B) Mycorrhiza is a symbiotic association between a fungus and the roots of higher plants.
$(i)$ The fungal symbiont in these associations absorbs phosphorus from the soil and passes it to the plant. This statement is correct.
(ii) Root nodules are formed by $Rhizobium$ bacteria in leguminous plants,not by mycorrhiza. This statement is incorrect.
(iii) Mycorrhiza provides resistance to root-borne pathogens to the host plant. This statement is correct.
(iv) Nitrogen fixation is performed by bacteria like $Rhizobium$ or $Azotobacter$,not by mycorrhiza. This statement is incorrect.
Therefore,statements $(i)$ and (iii) are correct. The correct option is $B$.