An acid-base reaction is the transfer of proton from an acid to a base. This is according to

Explanation

The correct answer is the Bronsted-Lowry concept, which specifically characterizes acids as proton donors and bases as proton acceptors, highlighting the transfer of a proton. The Arrhenius concept is focused on the formation of ions in aqueous solutions without explicit mention of proton transfer. The Lewis concept involves electron pair transfers, making it unrelated to proton transfer in acid-base reactions. Thus, only the Bronsted-Lowry concept correctly defines an acid-base reaction as a proton transfer.