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Choose the correct alternative to complete the series.

AZBY, CXDW, EVFU, ______

  • A.SHTG
  • B.STHO
  • C.GTHS
  • D.GXHW

Answer: C

The next term is GTHS.

Each term alternates letters from the two ends of the alphabet. The 1st and 3rd letters run forward, A B, C D, E F, so next come G and H. The 2nd and 4th run backward, Z Y, X W, V U, so next come T and S.

Interleaved, that is G T H S. GXHW repeats X and W from the second term, and SHTG and STHO reverse or scramble the pattern.

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