DSSSB · Reasoning

Three of the following four letter-pairs based on English alphabetical order are alike in a certain way and form a group. Which letter-pair does not belong to that group? (Note: Dissonant alternation is not based on the number of consonants/vowels or their location.)

  1. RM-KG
  2. NJ-GC
  3. ID-BX
  4. XS-QM
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