The two pericyclic reactions successively involved in the thermal transformation given below are:
1
6π - electrocyclization followed by [4 + 2] π-cycloaddition
2
8π - cycloaddition followed by [2 + 2] π-electrocyclization
3
6π - cycloaddition followed by [2 + 2] π-electrocyclization
4
4π - electrocyclization followed by [4 + 2] π-cycloaddition
5
Question Not Attempted