The correct option is D Citrus
Polyembryony refers to the phenomenon of having more than one embryo in the same seed. In Citrus, a seed has 2−40 embryos, one normal embryo and the rest adventitive embryos(mostly nucellar). In adventitive embryony, an embryo develops directly from a diploid cell other than egg like that of nucellus and integument, e.g., Citrus, Opuntia.