GMAT Sentence Correction (SC) | Re: Unlike transplants between identical twins, whose genetic en

GMAT weekly questions

Unlike transplants between identical twins, whose genetic endowment is the same , all patients receiving hearts of other organs must take antirejection drugs for the rest of their lives.

A. Unlike transplants between identical twins, whose genetic endowment is the same
B. Besides transplants involving identical twins with the same genetic endowment
C. Unless the transplant involves identical twins who have the same genetic endowment
D. Aside from a transplant