Choice B is correct. pyrophosphate groups in isoprenoid biosynthesis are good leaving groups, which as I believe is the final stage in terpene biosynthesis. Hope this helps! Rate lifesaver :) Solution Choice B is correct. pyrophosphate groups in isoprenoid biosynthesis are good leaving groups, which as I believe is the final stage in terpene biosynthesis. Hope this helps! Rate lifesaver :).