Among the following, the one that gives positive iodoform test upon reaction with ${\text{I}}_2$ and $\text{NaOH}$ is:

The iodoform test is positive for compounds containing a methyl ketone group (${\text{CH}}_3\text{C=O}$) or a secondary alcohol that can be oxidized to a methyl ketone (${\text{CH}}_3\text{CH(OH)}-$).A is 3-pentanol (no methyl group adjacent to $\text{CH-OH}$).B is 2-phenylethanol (no ${\text{CH}}_3$ on the $\text{C}$ bearing $\text{OH}$).C is tert-butyl alcohol (tertiary alcohol, cannot be oxidized to a ketone).D is 1-phenylethanol (${\text{C}}_6{\text{H}}_5-\text{CH(OH)}-{\text{CH}}_3$). It has the required ${\text{CH}}_3\text{CH(OH)}$ group.