Choose thew option in which the word BURN is used incorrectly or inappropriately.

(1) The incident of a steep fall from the terrace in childhood was burned in her memory. (2) The sky and the bottom of the picture needed substantial burning in. (3) Natural gas produces the cleanest burn of other fuels. (4) In the olden days, before the cure for rabies was discovered, the doctor would burn the wound to ward off infection. (5) In a typical Western diet, all the energy in protein is burned up daily.