Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group?

(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)

PS - MP

GJ - DG

EH - BE

RK - JH

APEDIA

RRB NTPC Graduate Tier 1

2025 • 09 Jun, 2025 • Shift-1

Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group?

(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)

Correct Answer

RK - JH

Alphabetic Relationship Tracking: We systematically analyze the forward positional shifts between the sequential letters comprising each pair's individual compo......

💡 Analysis & Explanation

Alphabetic Relationship Tracking ▼

We systematically analyze the forward positional shifts between the sequential letters comprising each pair's individual components. For PS - MP: within the first cluster, P(+3)=S; within the second, M(+3)=P. For GJ - DG: G(+3)=J, D(+3)=G. For EH - BE: E(+3)=H, B(+3)=E. All three of these options exhibit a beautifully consistent +3 forward incremental pattern internally.

Identifying the Deviation ▼

Now we evaluate RK - JH. Tracing the shift: R(-7)=K (or moving backward significantly), and J(-2)=H. This pair entirely lacks the uniform +3 structural symmetry consistently found in all other pairs.

Conclusion ▼

RK - JH acts as the mathematically mismatched pair and forms the odd one out.

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