Which of the following gives condensation with hydroxylamine but does not undergo self-condensation?

Identify the final product of the following reaction sequence:
$o$-Phthalaldehyde $\xrightarrow{\text{OH}^-} A$ $\xrightarrow{\text{H}^+, \Delta} ?$

$3$-hydroxybutanal is formed when $(X)$ reacts with $(Y)$ in dilute $(Z)$ solution. What are $X, Y$ and $Z$?

Identify the method that gives benzyl alcohol.

The reaction $CH_3-C(=O)-CH_2-C(CH_3)_2-CHO \xrightarrow{KOH, H_2O} (A)$; Product $A$ is

Write about the oxidation reaction of methyl ketone compounds $(R-CO-CH_3)$ by the haloform reaction or write a note on the Haloform test.