Select the order of increasing reactivity of the alkyl chlorides, 1-chlorohexane, 2-chlorohexane, and 3-chlorohexane, when reacted with KI in acetone. options: 1-chlorohexane < 2-chlorohexane < 3-chlorohexane 1-chlorohexane < 3-chlorohexane < 2-chlorohexane 3-chlorohexane < 2-chlorohexane < 1-chlorohexane 2-chlorohexane < 1-chlorohexane < 3-chlorohexane