URGENT what does two carboxyl groups condense to?

When two carboxyl groups condense, they can form an anhydride linkage. An anhydride is a functional group formed by the elimination of water (condensation) between two carboxyl groups (COOH). This reaction typically results in the formation of a cyclic molecule known as a carboxylic anhydride. The reaction can be represented as follows:
2 RCOOH (Carboxylic acids) → RCOOCOR (Carboxylic anhydride) + H2O