Given below are two statements:
Statement $I:$ Hyperconjugation is a permanent effect.
Statement $II:$ Hyperconjugation in ethyl cation $(CH_{3}CH_{2}^{+})$ involves the overlapping of $C_{sp^{3}}-H_{1s}$ bond with the empty $2p$ orbital of the adjacent carbon.
Choose the correct option:

The cyclic cations having the same number of hyperconjugation are: Choose the correct answer from the options given below:

Arrange the following according to the instructions:
$(i)$ Arrange in descending order of acidic strength:
$CH_3COOH, (CH_3)_3CCOOH, (CH_3)_2CHCOOH, CH_3CH_2COOH$
(ii) Arrange in descending order of stability:
$\stackrel{+}{CH}_3, (CH_3)_3\stackrel{+}{C}, CH_3CH_2^+, (CH_3)_2\stackrel{+}{CH}$
(iii) Arrange in increasing order of acidic strength:
$CCl_3COOH, CH_3COOH, CHCl_2COOH, CH_2ClCOOH$
(iv) Arrange in increasing order of stability:
$(a)$ $CH_3CH=CH-CHO$
$(b)$ $CH_3\stackrel{+}{CH}-CH=C-O:^-$
$(c)$ $\stackrel{+}{CH}_2-CH=CH-C=O$
$(v)$ Arrange in decreasing order of stability:
$(I)$ $CH_2=CH-CHO$
$(II)$ $\stackrel{+}{CH}_2-CH=C-H$ (with $O^-$)
$(III)$ $:CH_2-CH=C-H$ (with $O^-$)

Which among the following pairs of electronic effect and its example is $NOT$ correct?

Explain the electron displacement effects in covalent bonds.

Represent the three types of electron movement in organic reactions.