N25-CHEM-HL-TZ1-P1A-Q35 [Q-24529]

Which compound undergoes oxidation when heated with acidified potassium dichromate?
I. $CH_{3}CH_{2}CH_{2}CH_{2}OH$
II. $CH_{3}C(CH_{3})_{2}OH$
III. $CH_{3}CH(OH)CH_{2}CH_{3}$