Which of the following species does not exert a resonance effect?

Draw other resonance structures related to the following structure and find out whether the functional group present in the molecule is ortho,para directing or meta directing.

Arrange the following in the decreasing order of stability:
$I. CH_2=CH-CHO$
$II. ^+CH_2-CH=CH-O^-$
$III. ^-CH_2-CH=CH-O^+$

For the given compounds,the correct order of resonance energy is:
$(I)$ $CH_2=CH-CH=CH-OCH_3$
$(II)$ $CH_2=CH-C(OCH_3)=CH_2$
$(III)$ $CH_2=CH-OCH_3$

Resonance effect is not observed in

Given below are two statements.
Statement $I :$ The dipole moment of $CH_3-CH=C(CH_3)-CH=O$ is greater than $CH_3-CH_2-CH_2-CH=O$.
Statement $II :$ $C_1-C_2$ bond length of $CH_3-CH=CH-CH=O$ is greater than $C_1-C_2$ bond length of $CH_3-CH_2-CH_2-CH=O$.
In the light of the above statements,choose the correct answer from the options given below $:$