In a redox reaction, one of the reactants must release

a. H + ions

b. OH - ions

c. electrons

d. gas

Redox reaction is the reduction and oxidation reaction. It is a chemical reaction that involves a transfer of electrons. It can mean loss of oxygen (oxidation) or gain of electrons (reduction). Oxydation is the process of where a sustance loses electrons, gains an oxygen atom/s, loses a hydrogen atom/s. reduction is the opposite.

In a redox reaction, one of the reactants must release electrons.