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In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

d_ba_c_a_cb_

  • A.cdbda
  • B.cdbad
  • C.bdacd
  • D.abdca

Answer: A

Correct answer: cdbda

Filling the gaps gives dcba repeated three times. The five missing positions read in order are c, d, b, d, a. The known letters already show d and b in the first block and a and c in the second, which is enough to identify the four-letter cycle before any option is tested.

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