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Which among the following is incorrect about Dikaryon?

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Which among the following is incorrect about Dikaryon?

(a) Dikaryon is formed by fusion of two nuclei

(b) Dikaryon is haploid nuclei formed due to fusion of two nuclei

(c) It further undergoes meiosis to form haploid cells

(d) Dikaryon is formed only during adverse environmental conditions

I had been asked this question in final exam.

I need to ask this question from Biological Classification in division Biological Classification of Biology – Class 11

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Right answer is (b) Dikaryon is haploid nuclei formed due to fusion of two nuclei

The explanation: Dikaryon is formed due to karyogamy. Sexual cycle of fungi comprises of 3 main steps: Plasmogamy, Karyogamy and Meiosis. Fungus prefers sexual reproduction over asexual reproduction during adverse environmental conditions.  Initially, the cytoplasm of both the cells fuse which is called plasmogamy and followed by fusion of nuclei to form a diploid zygote called dikaryon. Later dikaryon undergoes meiosis in order to produce haploid spores.

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