Which of the following does not undergo Cannizzaro's reaction?

Identify the correct statements about $Z$ in the following reaction sequence:
$C_2H_5NH_2$ $\xrightarrow[NaNO_2 / HCl]{} X$ $\xrightarrow{H_2O} Y$ $\xrightarrow{Cu / 573 \ K} Z$
$I$. $Z$ is an aldehyde
$II$. $Z$ undergoes Cannizzaro reaction
$III$. $Z$ gives iodoform test
$IV$. $Z$ does not give test with Tollens' reagent

Which compound undergoes the iodoform reaction?

Which of the following aldehydes is less reactive towards nucleophilic addition reaction?

Which of the following on reaction with Grignard reagent followed by hydrolysis forms a tertiary alcohol?

Acetophenone,when reacted with a base,$C_2H_5ONa$,yields a stable compound which has the structure: