[Solved] Ion exchange chromatography is a commonly used method for separation of biomolecules. In what order would Arg, Val, and Glu

Ion exchange chromatography is a commonly used method for separation of biomolecules. In what order would Arg, Val, and Glu elute from a carboxymethyl column at pH 6.0. Carboxymethyl is negatively charged at pH 6.0. a. Glu, Val, Arg b. Arg, Val, Glu c. Val, Glu, Arg d. Glu, Arg, Val