GKFix MCQ Question

What is the correct definition of the resonance effect as given in the text?

• A. The polarity caused by electronegativity differences in sigma bonds
• B. The polarity produced in the molecule by the interaction of π-bonds or between a π-bond and a lone pair of electrons present on an adjacent atom
• C. A temporary dipole formed by external electric field
• D. The separation of charge due to ionization