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Question

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series:
ACE, BDF, CEG, ?

This question was previously asked in
SSC CGL 2025 Tier 2 Paper 1 Question Paper (19-Jan-2026)
The correct answer is
DFH

Letter Series Pattern Analysis

The question presents a series of three-letter clusters: ACE, BDF, CEG, ? We need to find the pattern governing this series to determine the missing cluster.

Identifying the Alphabetical Progression

Let's analyze the progression of each letter position across the series:

  • First Letter: The first letters of the clusters are A, B, C. Each subsequent letter is the next letter in the alphabet (A + 1 = B, B + 1 = C). Following this pattern, the next first letter is C + 1 = D.
  • Second Letter: The second letters are C, D, E. Each subsequent letter is also the next letter in the alphabet (C + 1 = D, D + 1 = E). Therefore, the next second letter is E + 1 = F.
  • Third Letter: The third letters are E, F, G. Similarly, each subsequent letter is the next in the alphabet (E + 1 = F, F + 1 = G). The next third letter is G + 1 = H.

Determining the Missing Cluster

Combining the next letters for each position (D, F, H), we find the missing cluster in the series is DFH.

This corresponds to Option A.

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Similar Questions

  1. Which of the following alternative will fill the blanks?
    _f_hk_gh_fg_k
  2. In the sequence A, C, F, J..., which letter is the $5^{th}$?
  3. Select the letter-cluster from among the given options that can replace the question mark (?) in the following series:
    M C K J H N G M Q D R T ?
  4. What comes next in the series?
    D, I, N, S, ?
  5. What comes next in the series? 

    A, C, F, J, O, ?

  6. What comes next? 

    LM, KN, JO, IP, ?

  7. What comes next in the series?
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  9. Which letter trio does NOT follow the ascending order? ABC, BCD, CDE, DFE, EFG

  10. From the given options, select the group of letters that, when inserted in order from left to right into the blanks of the incomplete series, will logically complete it.

    S__KB_FH_BSF_K_SF__B


Important Questions from Letter Based Series

  1. Select the option that represents the letters that when sequentially placed from left to right in the blanks below will complete the letter series.

    Y _ Y _ _ Y _ T _ Y _ Y

  2. Select the option that represents the letters that when sequentially placed from left to right in the blanks below will complete the letter series.

    Y _ Y _ _ Y _ T _ Y _ Y

  3. Select the triad that follows the same pattern as that followed by the two triads given below. Both triads follow the same pattern. 
    KF-MH-OQ 
    ID-KF-MO

  4. What should come in place of the question mark (?) in the given series based on the English alphabetical order? 
    BIG DKI FMK HOM ?

  5. Observe the following incomplete letter sequence carefully:
    aa_bbc_aa bb_aaac_cc.
    A specific pattern governs the order and repetition of the letters. Choose the option that best fills the blanks (in order) to complete the sequence logically and symmetrically.
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