The electron displacement effect observed in the given structures is known as

The number of activating and deactivating groups of the following are respectively

$$ \begin{aligned} & -\mathrm{OCH}_2 \mathrm{CH}_3,-\mathrm{COCH}_3,-\mathrm{NHCOCH}_3, \\ & -\mathrm{COOCH}_3, \mathrm{SO}_3 \mathrm{H} \end{aligned} $$

The delocalisation of $\sigma$ electrons of C-H bond of an alkyl group with the $\pi$ electrons of benzene is observed in

$$ \text { Consider the following three resonance structures } $$

The correct order of their stabilities is