Identify the product $A$ in the following reaction:
(Image of a tricyclic allylic alcohol reacting with $p$-benzoquinone in the presence of $[(CH_3)_3CO]_3Al$ to form $A$)

With reference to the scheme given,which of the given statement$(s)$ about $T$,$U$,$V$ and $W$ is (are) correct?
$A$. $T$ is soluble in hot aqueous $NaOH$
$B$. $U$ is optically active
$C$. Molecular formula of $W$ is $C_{10}H_{18}O_4$
$D$. $V$ gives effervescence on treatment with aqueous $NaHCO_3$

In the given reaction,$[X]$ will be:

The major product of the following reaction sequence is

What is the correct order of increasing acidity for the following compounds?
$I$: Phenol
$II$: Cyclohexanol
$III$: Cyclohexanecarboxylic acid
$IV$: Ethynylcyclohexane

What combination of acid chloride or anhydride and arene would you choose to prepare the given compound?