High HCG is most commonly invasive mole and rising HCG is choriocarcinoma

high HCG is most commonly invasive mole and rising HCG is choriocarcinoma.

Yes you are correct that plateau HCG is more characteristic finding in invasive mole . But here you have to choose one option and better answer is A : because it’s not Increased NUMBER of theca lutein cysts which is marker of GTN ; it’s PERSISTENT theca lutein cysts or progressive increase in size of cysts which indicate GTN . You can have very high no. Of these cysts in Complete Mole also but that’s not a GTN .