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Question

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.

DIN, INS, NSX, SXC, ?

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

XCH

Each cluster of three letters is formed by taking letters at positions that increase by +5 (with wrap-around modulo 26), and the next cluster begins from the second letter of the previous cluster.

Cluster pattern (each letter +5):

D(4) → I(9) → N(14)

I(9) → N(14) → S(19)

N(14) → S(19) → X(24)

S(19) → X(24) → C(29 - 26 = 3)

Next: X(24) → C(29 - 26 = 3) → H(34 - 26 = 8) = XCH.

Hence the answer is XCH.

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