Which one of the following compounds does not exhibit resonance?

In which of the following is the first resonating structure less stable compared to the second one?

Which of the following is the least stable?

Correct statements for the given reaction are :
$A$. Compound '$B$' is aromatic
$B$. The completion of above reaction is very slow
$C$. '$A$' shows tautomerism
$D$. The bond lengths $C-C$ in compound $B$ are found to be same
Choose the correct answer from the options given below :

Consider the following statements. Which of the following statement$(s)$ is/are correct?
$(a)$ $CH_2=CH-CH_2^+$ is more stable than $CH_3-CH^+-CH_3$.
$(b)$ Naphthalene has two types of $C-C$ bonds.
$(c)$ The structures shown are both permissible resonating structures.
$(d)$ The phenyl anion is less stable than the cyclohexadienyl anion shown.

Identify the compound in which steric inhibition of resonance is present.