Dikaryophase / Dikaryon formation is a specific characteristic of

Given below is the diagram of a bacteriophage. In which of the options all four parts $A, B, C$ and $D$ are correct.

Given below the following statements about labelling $\left(i\right)$and $\left(ii\right)$
(a) Labelling$\left(i\right)$ can-fix atmospheric nitrogen even in the presence of ${\mathrm{O}}_2$
(b) Labelling $\left(ii\right)$ is also found around pollen grains of hydrophilous plants
(c) Labelling $\left(i\right)$ is found is Nostoc & anabaena
(d) Labelling $\left(i\right)$ & $\left(ii\right)$ are features of photosynthetic autotrophs & chemosynthetic autotrophs.
In the above statements, pick up the incorrect statements about labelling $\left(i\right) \& \left(ii\right)$