The correct option is A Apomictic diploids
Apomixis is a mode of reproduction, which does not involve the formation of zygote through gametic fusion. In adventive embryony, an embryo develops directly from a diploid cell other than egg like that of nucellus and integument. For example, Citrus, Opuntia. It gives rise to a condition called polyembryony or the phenomenon of having more than one embryo. Thus, the correct answer is option C.