What are $X$ and $Y$ respectively in the following reaction sequence?

Which of the following compounds gives the Iodoform reaction?

The reaction between benzaldehyde and acetophenone in the presence of dilute $NaOH$ is known as:

Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is

An organic compound having the molecular formula $C_8H_{10}O$ on being heated with $I_2$ and dilute $NaOH$ gives a yellow precipitate. The expected compound is

$p$-Cresol reacts with chloroform in an alkaline medium to give compound $A$,which on addition of hydrogen cyanide forms compound $Y$. Acidic hydrolysis of $Y$ yields a chiral carboxylic acid. What is the structure of the carboxylic acid?