Given below are the stages in the sexual reproduction of higher...

In higher fungi belonging to Ascomycetes and Basidiomycetes, the sexual cycle follows a characteristic sequence of events as described in standard NCERT textbooks.

The process begins with Plasmogamy, which is the fusion of protoplasms between two motile or non-motile gametes of compatible mating types. This corresponds to stage D.

In these higher fungi, the fusion of the two haploid nuclei does not occur immediately. Instead, an intervening dikaryotic stage or condition ($n + n$, i.e., two nuclei per cell) is established, which is called a dikaryophase. This corresponds to stage E.

The two nuclei fuse later in subsequent specialized structures, a process called Karyogamy, which results in the formation of a diploid cell. This corresponds to stage A.

The diploid cell or zygote then undergoes Meiosis to form haploid spores, ensuring the return to the haploid phase. This corresponds to stage B.

These events, including karyogamy and meiosis, take place within specialized structures called fruiting bodies that are formed by the fungal mycelium. This final structural organization corresponds to stage C.

Following this order, the precise sequence of stages is D $\rightarrow$ E $\rightarrow$ A $\rightarrow$ B $\rightarrow$ C.