Correct option is C
The Hückel method or Hückel molecular orbital theory, is a simple method for calculating molecular orbitals as linear combinations of atomic orbitals.



For the molecule methylenecyclopropene (structure given below), the roots obtained from the Hückel secular determinant can be approximated as

being the energy of a π orbital.

The Hückel method or Hückel molecular orbital theory, is a simple method for calculating molecular orbitals as linear combinations of atomic orbitals.


