In each of the following questions, select the one which is different from the other three responses.
Dividing the words in groups of 2 and then swapping letters in the first group, we get :
DC FG - CD FG
FE HI - EF HI
JI LM - IJ LM
HG JL - GH JL
Clearly, only in the fourth option, one letter is missing between J and L
=> Ans - (D)
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