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Three letters are reversed within each group here. Which group belongs at the question mark?
EDC, HGF, KJI, ?

  • A.LMN
  • B.MLK
  • C.NMO
  • D.NML

Answer: C

Correct answer: NML

Each group holds three consecutive letters in descending order, and successive groups begin three places further on: E, H, K. The next begins at N and reads NML. The two rules - the internal reversal and the three-step between groups - are independent, and the answer has to honour both. MLK starts one place too early. The internal reversal and the three-step between groups are independent rules, and an answer must satisfy both to be correct.

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