What is the product of the following reaction?

Which of the following reactions produce $n$-butanol?

Which of the following statements is not incorrect?
$(i)$ tert-butyl chloride is easily hydrolysed to give alcohol.
$(ii)$ Secondary alcohol gives a blue colour in the Victor-Meyer test.
$(iii)$ The $IUPAC$ name of the given structure is $3-$methylpentan$-2-$ol.
$(iv)$ Alcohol releases $CH_4$ gas with a Grignard reagent (not $H_2$ gas).

The major product in the following reaction sequence is:

The structure of the product formed in the reaction given below is:

$p-$Cresol reacts with chloroform in an alkaline medium to give compound $A$,which reacts with hydrogen cyanide to form compound $Y$. Hydrolysis of $Y$ gives a chiral carboxylic acid. Identify the structure of the carboxylic acid.