Organic Chemistry
Because the negative charge in B is more delocalized, it is less stable and contributes more to the resonance hybrid structure than A.
Because the negative charge in B is less delocalized, it is more stable and contributes more to the resonance hybrid structure than A.
Because the negative charge in A is more delocalized, it is more stable and contributes more to the resonance hybrid structure than B.
Because the negative charge in A is less delocalized, it is less stable and contributes more to the resonance hybrid structure than B.