Select the correct statement.
(i) Delocalisation of  σ-electron is hyperconjugation.
(ii) Delocalisation of $\text{π}$-electron is resonance.
(iii) Partial displacement of ​σ-electron is inductive effect.

Stability of $\pi$ -bond in following alkenes in the increasing order is:

Which among the following statements are true with respect to electronic dlisplacement in a covalent bond

(a) Inductive effect operates through $\mathrm{\pi }$ -bond
(b) Resonance effect operates through $\mathrm{\sigma }$ -bond
(c) Inductive effect operates through $\mathrm{\sigma }$ -bond
(d) Resonance effect operates through $\mathrm{\pi }$ -bond
(e) Hyperconjugation involves $\mathrm{C}-\mathrm{H}$ sigma bond electrons

Which of the following is correct about the following compound

The correct order of $+\mathrm{M}$ effect of $\text{'}\mathrm{N}\text{'}$ containing functional group on the benzene ring, amongst the given compounds is