Identify the product of the following reaction:
$CH_3-CO-CH_2-CH_2-CH_2-CHO \xrightarrow{NaOH, \Delta} \text{Product}$

$C_6H_5-CH=CHCHO \xrightarrow{X} C_6H_5-CH=CHCH_2OH$. In the above sequence,$X$ can be:

$CCl_3CHO \xrightarrow[KOH]{Conc.}$ Main product is

Acetaldehyde can be converted into $C(CH_2OH)_4$ (pentaerythritol) by which reagent?

$A$ molecule $(X)$ with the following structure is hydrolyzed under mild acidic conditions to produce $(Y)$ and $(Z)$. Identify the correct statements about $(Y)$ and $(Z)$ from the following list:
$(A)$ Both $(Y)$ and $(Z)$ have the same molar mass.
$(B)$ Both $(Y)$ and $(Z)$ give a positive Tollens' test.
$(C)$ Both $(Y)$ and $(Z)$ give a positive iodoform test.
$(D)$ Both $(Y)$ and $(Z)$ react with $2,4$-dinitrophenylhydrazine to form a hydrazone derivative.

Find out the major product from the following reaction: