In the chain rearrangement of allyl phenyl ether, an intramolecular rearrangement occurs to form the ortho and para derivative of allyl phenol. Consider the reaction given below. ( C* represents labelled carbon)
A and B respectively are-
The intramolecular pericyclic mechanism takes place to form the products shown above. The formation of para isomer takes via the ortho isomer.
Hence, the correct option is (1).