Different possible thermal decomposition pathways for peroxyesters are shown below. Match each pathway from List I with an appropriate structure from List II and select the correct answer using the code given below the lists.
Column I — P: Pathway P: homolysis followed by decarboxylation; Q: Pathway Q: concerted rearrangement of a tertiary peroxyester; R: Pathway R: fragmentation of a tertiary benzoyl peroxyester; S: Pathway S: benzoyloxy radical pathway
Column Ii — 1: CX6HX5CHX2C(O)O−OCHX3; 2: CX6HX5C(O)O−OCHX3; 3: CX6HX5CHX2C(O)O−OC(CHX3)X2CHX2CX6HX5; 4: CX6HX5C(O)O−OC(CHX3)X2CX6HX5