Which of the following compounds on reaction with ammoniacal silver nitrate solution forms a precipitate of silver?

The product $A$ in the following reaction 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?

Product $(Q)$ is :-

Consider the given reaction:
$CH_3-CO-CH_3 \xrightarrow{C_6H_5COOOH} CH_3-COO-CH_3$
The above reaction is known as:

Which of the following is Clemmensen reduction?