The least likely reason that pigs have been chosen as donors for humans in the process of xenotransplantation is the same DNA as humans.
Xenotransplantation is the process of transplanting organs from one species to another.
Since pigs and humans are different species they cannot have the same DNA this is because in different species the nucleotide sequence of the DNA varies significantly.
Thus, among the listed options the same DNA as humans is the most inappropriate reason to use pigs for xenotransplantation.