The electromeric effect in organic compounds is a....

Explain the inductive effect with a suitable example.

Given below are two statements $:$
Statement $I :$ Hyperconjugation is not a permanent effect.
Statement $II :$ In general,greater the number of alkyl groups attached to a positively charged $C$ atom,greater is the hyperconjugation interaction and stabilization of the cation.
In the light of the above statements,choose the correct answer from the options given below

The decreasing order of $-I$ (inductive) effect power for the given groups is:
$A. -CN$
$B. -NO_2$
$C. -NH_2$
$D. -F$

Steric inhibition of resonance takes place in

Which group exhibits the maximum hyperconjugation effect?