Which of the following is a redox reaction?
NaClNaClNaCl + KNO3KNO_3KNO3 -> NaNO3NaNO_3NaNO3 + KClKClKCl
CaC2O4CaC_2O_4CaC2O4 + 2HCl -> CaCl2CaCl_2CaCl2 + H2C2O4H_2C_2O_4H2C2O4
Mg (OH)2 + 2NH4Cl -> MgCl2MgCl_2MgCl2 + 2NH4OH
Zn + 2AgCN -> 2Ag + Zn (CN)2
(D) Zn + 2AgCN -> 2Ag + Zn (CN)2
Explanation: