Dizygotic twins are connected to a single placenta during their embryonic development. These twins (A) have identical MHC haplotypes (B) have identical TH cells (C) have identical T cells (D) can accept grafts from each other (both (A) and (B))

Answer: (D) can accept grafts from each other (both (A) and (B))
Dizygotic twins, also known as fraternal twins, do not have identical MHC haplotypes or T cells. However, they can sometimes accept grafts from each other due to shared placenta and similar immune environments, but they still have distinct immune systems.