The glycosaminoglycan which does not contain uronic acid is

(B) Heparin

Heparin is a glycosaminoglycan that does not contain uronic acid. Instead, it contains iduronic acid, which is an epimer of glucuronic acid, but the more specific point is that heparin’s structure can include sulfated glucosamine and iduronic acid residues, distinguishing it from others like hyaluronic acid and chondroitin sulfate that prominently feature uronic acids.