DSSSB · Reasoning

Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster does not belong to that group? (Note: Incongruent letter-cluster pairs are not based on the number of consonants/vowels or their position.)

  1. QSY
  2. IDK
  3. OJQ
  4. PKR
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