Which of the following has delocalized electrons?

(A)

B)

C)

D) Not in resonance because double bond and positive charge are not in conjugation.

E) It will form this:

F) Positive charge and double bond are conjugate so it will delocalize.

G) Not in resonancebecause double bond and positive charge are not in conjugation.

H) Not in resonance because two double bonds are not in conjugation.

I)Not in resonancebecause double bond and lone pair of nitrogen are not in conjugation.

J) Not in resonance

k) Not in resonance because two double bonds are not in conjugation.

L)

M- Positive charge and double bond are conjugate so it will delocalize.

N- Lone pair of nitrogen and double bond are in conjugation so it will delocalize electrons.

O-

A-Oxygen has lone pair so it can delocalized.

B- Oxygen has lone pair so it can delocalized.

C- Positive charge and double bond are conjugate so it will delocalize.

D- Not in resonance because double bond and positive charge are not in conjugation

E- Bond will shift to adjacent carbons so it will delocalize electrons.

F- Positive charge and double bond are conjugate so it will delocalize.

G) Not in resonancebecause double bond and positive charge are not in conjugation.

H) Not in resonance because two double bonds are not in conjugation.

I)Not in resonancebecause double bond and lone pair of nitrogen are not in conjugation.

J) Not in resonance

k) Not in resonance because two double bonds are not in conjugation.

L- It has delocalized electrons.

M- Positive charge and double bond are conjugate so it will delocalize.

N- Lone pair of nitrogen and double bond are in conjugation so it will delocalize electrons.

O- Bond will shift to adjacent carbons so it will delocalize electrons.