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Question

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

MNO, OPQ, QRS, ?

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

STU

Each cluster contains three consecutive letters; the start letter of each cluster increases by 2.

M(13), O(15), Q(17), so next start = 19 = S.

The next cluster is STU.

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