D) Monochorionic dizygotic twins
Chimerism refers to a condition where an organism shows different cell lines that originated from two different zygotes.
Mosaicism refers to a condition where an organism shoes two different cell lines that originated from the same zygote.
Monochorionic dizygotic twinning is a rare event, however it has increasingly been reported following assisted techniques of reproduction. Monochorionic dizygotic twinning when present has a high frequency of blood chimerism.
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