Which of the following compounds would undergo Cannizzaro's reaction?

Cannizzaro reaction between formaldehyde molecules involves the formation of

In the following reaction,the major product $X$ is

The major product formed in the following reaction is:

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

An alkene $(A)$ $C_{16}H_{16}$ on ozonolysis gives only one product $(B)$ $C_8H_8O$. $(B)$ can also be obtained by the hydrolysis of the product obtained from the reaction between cyanobenzene and $CH_3MgBr$. $(A)$ shows geometrical isomerism and decolourises $Br_2$ water. $(B)$ on treatment with $SeO_2$ produces $(C)$. Which statement is not correct about $(B)$?