" In which of the following molecules,the substituent does not exert its resonance effect? "

In which of the following molecules, the substituent does not exertis resonance effect ?

In which of the following molecules, the substituent does not exert it's resonance effect ?

In which of the following compounds, does the substituent not exert its resonance effect?

In which of the following molecule/ions are the inductive effect, resonance effect, and hyperconjugation all operating simultaneously?

Which of the following molecules represent the resonance?

Which of the following molecule does not exist due to its zero bond order?