Which of the following compounds will give a yellow precipitate with iodine and alkali?

2-Hydroxypropane will give ${\mathrm{CH}}_3{\mathrm{COCH}}_3$ which, in turn, will show iodoform test.

${\mathrm{CH}}_3\mathrm{COR}$ is oxidized by NaOI to form iodoform and ${\mathrm{RCO}}_2\mathrm{Na}$

wherein

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{COCH}}_3+\mathrm{NaOH}+{\mathrm{I}}_2\to {\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CO}}_2\mathrm{Na}+{\mathrm{CHI}}_3$

Acetamide and methyl acetate don't produce a yellow precipitate.

However, acetophenone and 2-hydroxypropane will result in a yellow precipitate.