The number of no bond resonance structures possible for but$-1-$ene and a $3^{\circ}$ carbocation having methyl,ethyl,and isobutyl groups on the cationic carbon,respectively,are:

In the following resonance structures,the curved arrow indicates that electrons are shifted from:

Which of the following compounds has the maximum enol content?

The correct order for the rate of decarboxylation of the following compounds with sodalime will be:

The arrangement of $CH_3-CH_2-CH_2-$,$(CH_3)_2CH-$,and $(CH_3)_3C-$ groups in increasing order of their inductive effect ($+I$ effect) is:

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$ : Order of acidic nature of the following compounds is $A > B > C$.
(Image shows: $A$ is $2$-chlorocyclohexanol,$B$ is $4$-fluorocyclohexanol,$C$ is $3$-methylcyclohexanol)
Reason $R$ : Fluoro is a stronger electron withdrawing group than Chloro group.
In the light of the above statements,choose the correct answer from the options given below: