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)

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 06 Jun, 2025 Shift 2)
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  1.  FG - AB
  2. PK - MJ
  3. NO - IJ
  4.  JK - EF

Answer (Detailed Solution Below)

Option 2 : PK - MJ
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Detailed Solution

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Let's analyze the pattern for each letter-cluster pair by looking at the positional value of the letters in the English alphabet (A=1, B=2, ..., Z=26).

1) FG - AB

qImage686ccf44ba812e7c08a5b6f4

Here, the pattern is -5 for both letters.

2) PK - MJ

qImage686ccf45ba812e7c08a5b6f5

Here, the pattern is -3 for the first letter and -1 for the second letter.

3) NO - IJ

qImage686ccf45ba812e7c08a5b6f6

Here, the pattern is -5 for both letters.

4) JK - EF

qImage686ccf46ba812e7c08a5b708

Here, the pattern is -5 for both letters.

From the analysis, the pairs FG - AB, NO - IJ, and JK - EF all follow a pattern of subtracting 5 from the positional value of each letter.

However, the pair PK - MJ does not follow this pattern.

Hence, the correct answer is "Option 2".

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