question_answer 59)

  (I)                                           (II)                                    (III) (a)                   (b) (c)                    (d)

Answer:

  (d) Presence of electron-donating group at o- position w.r.t. Cl decreases reactivity to a greater extent than at m-position. Thus, option (d) is correct, i.e., II < III < I.