Answer:
Zygote
Explanation:
Zygote is formed by the process of fertilization in which the male and female gamete fuse together. Zygote is the earliest stage in the development of multicellular organisms.
Zygote is diploid as it formed by the fusion of male gamete (haploid) and female gamete (haploid). Zygote contains chromosomes from the male and female.
Thus, the correct answer is option (D).
