The major cycloaddition product (A or B) formed and the orbital interactions involved in the following transformation, respectively, are
1
A and 8πs + 2πs
2
A and 8πs + 2πa
3
B and 4πs + 2πs
4
B and 4πs + 2πa
The major cycloaddition product (A or B) formed and the orbital interactions involved in the following transformation, respectively, are