# Problem: Which one of the following represents the lowest energy p-bonding molecular orbital of 1,3-butadiene? A) I B) II C) III D) IV E) None of the above.

###### Problem Details

Which one of the following represents the lowest energy p-bonding molecular orbital of 1,3-butadiene?

A) I

B) II

C) III

D) IV

E) None of the above.