The compound that gives a positive iodoform test is

2-Pentanone contains ${\mathrm{CH}}_3\mathrm{CO}-$group. It will show iodoform test.

2-Pentanone  can be written as: ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2(\mathrm{C}=\mathrm{O}){\mathrm{HCH}}_3$, which has one methyl ketone group.

So, it can give a positive iodoform test.