The correct option is
C Both (A) and (B)
Mitosis is equational division in which chromosome number remains the same in progeny and parent cell. It is basically the division responsible for the proliferation of cells. It occurs in both haploid and diploid individuals. In plants, haploid spores proliferate mitotically to produce gametophytes. In both plants and animals, growth occurs due to mitosis in diploid cells
So, the correct answer is 'Both (A) and (B)'