Elimination of nucleus of one species from a normal heterozygous species is occurs in:

Correct option is A

Cybrids (cytoplasmic hybrids) are formed by the fusion of a normal plant cell with a cell that has had its nucleus removed, allowing the cytoplasm of one species to combine with the nuclear material of another species. In this process, the nucleus of one species is eliminated, and the cytoplasm is used to carry the genetic material from another species. This process leads to a combination of nuclear DNA from one species with cytoplasmic DNA from another, creating a unique organism.