Select the reaction that is not an oxidation-reduction reaction:
a) CH4(g) + Br2(g) CH3Br(g) + HBr (g)
b) 2Na(s) + 2H2O(1) 2NaOH(aq) + H2(g)
c) 2H2(g) + O2(g) 2H2O(1)
d) 3OCl (aq) 2Cl (aq) + CIO3 (aq)
e) CO2(g) + Ca(OH)2 (5) CaCO3(s) + H2O(1)