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In the following resonance structures th...

In the following resonance structures the curved arrow indicates that electrons are shifted from

A

atom of adjacent bond in both (A) and (B)

B

`pi` - bond to adjacent atom in both (A) and (B)

C

`pi` - bond to adjacent atom in (A) and atom to adjacent bond in (B)

D

atom to adjacent bond in (A) and pi - bond to adjacent atom in (B)

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The correct Answer is:
D
In the given resonating sturctures, the curved arrow indicates that the electrons are shifted from .O. atom to adjacent bond in (A)
Here, the lone pair of .O. atom are used in the formation of double bond. In reaction (B) electrons are shifted from `pi` - bonds between C and N - atoms to adjacent atom N
.N. atom is highly electronegative and thus, pulls the electron towards itself .

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