The correct option is C morula
The zygote undergoes mitotic divisions called cleavage. The daughter cells formed by mitotic cleavage of the zygote is called blastomeres. Embryo with 8-16 blastomeres is called Morula and looks like a fruit of mulberry.
Morula further divides to form blastocyst and moves further towards the uterus.
Morula → Blastula → Gastrula
↑ ↑
Cavity Germ layers
Appears Formation