Which of the following is not an intramolecular redox reaction?

Which of the following is not intramolecular redox raction?

Cartain materials such as turpentine oil, unsaturated organic compound, phosophorus, metals such as Zn , and Pb , etc., can absorb O_(2) from air in the presence of H_(2)O , which is converted to absorb O_(2) from air in the presence of H_(2)O , which is converted to H_(2)O_(2) . This is called autoxidation. Intermolecular redox reactions are those in which one molecule is oxidised and the other is reduced. Intramolecular redox reactions are those in which oen atom of a molecule is oxidised and the other atom is reduced. Which of the following reactions is//are intramolecular redox reactions (s) ?

Which of the following is redox reaction