Doubt from GOC

How is -R possible in the above compound.Please confirm if the answer given is wrong.
I know it's a stupid doubt but just for confirmation.

I don't know I am right or wrong but still my reason : As (-R) applies when π electrons shift to the attached group and it's happening here

Bhai will that really happened bcoz Then carbon will have +ve charge and oxygen -ve charge.Highly unstable resonating structure banega.

Anyone having a valid reason please explain.