`(X):CH_(3)-overset(O)overset(||)C-CH_(2)-overset(O)overset(||)C-OC_(2)H_(5),(Y) : CH_(3)-overset(O)overset(||)C-CH_(2)COOH,(Z):C_(2)H_(5)OH`
(X) and (Y) have `CH_(3)-overset(O)overset(||)C-` group hence, they will show iodoform test. Alcohol (Z) on oxidation gives `CH_(3)-overset(O)overset(||)C-` group hence, it will also give iodoform test.