Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster 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.)

1. A

   XVU

2. B

   QPN

3. C

   LJI

4. D

   TRQ

Appeared in: RRB Nsg. Superintendent -29 April-2025 (shift-2nd)

Explanation

• The letter cluster QPN is the correct answer because it follows a unique pattern of positional differences between its letters compared to the other options.
• The pattern in QPN is -1, -2. The second letter (P) is 1 position before the first letter (Q) in the alphabet, and the third letter (N) is 2 positions before the second letter (P).
• QPN matches the defining clue or classification criterion in the stem.
• Supporting mechanism: The option aligns with the governing rule, pattern, sequence, classification, or exam logic being tested.
• Key differentiator: It fits the one fact that separates the correct response from the closest distractor.

Why Other Options Were Wrong

• Option A: This option is incorrect because it follows the common pattern of -2, -1. V is 2 positions before X, and U is 1 position before V.
• Option C: This option is incorrect because it also follows the common pattern of -2, -1. J is 2 positions before L, and I is 1 position before J.
• Option D: This option is incorrect as it follows the same -2, -1 pattern. R is 2 positions before T, and Q is 1 position before R.

Related Visual

• Visual 1: Table. A table showing each letter cluster, the alphabetical position of each letter, and the calculated difference between them. This visually highlights the common pattern in three options and the different pattern in the odd one out.

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning: Finding the odd one out in a letter series as background academic context rather than a clinical decision trigger.
• This is a logical reasoning question designed to test analytical and pattern-recognition skills.
• These skills are foundational for nurses, who must often identify subtle patterns in patient symptoms, lab results, and vital signs to make sound clinical judgments.
• For example, recognizing a pattern of gradually decreasing blood pressure and increasing heart rate can signal hypovolemic shock, requiring immediate intervention.

How to Approach the Question

• First, read the question carefully to understand the task: find the letter cluster that does not fit the pattern of the other three.
• The prompt notes that the pattern is not based on vowel/consonant count, so focus on positional relationships.
• For each option, convert the letters into their corresponding numerical positions in the alphabet (A=1, B=2, ..., Z=26).
• Calculate the difference (or 'gap') between the positions of consecutive letters in each cluster (e.g., 1st to 2nd, 2nd to 3rd).
• Compare the patterns of these differences across all four options.
• Identify the single option that has a different pattern of differences from the other three. This is the correct answer.

Concept Tested & Keywords

• Concept Tested: Logical Reasoning: Finding the odd one out in a letter series.
• Stem keywords: English alphabetical order, letter-clusters, alike, group
• Lead-in keywords: DOES NOT belong
• Negative lead-in flag: The question asks to identify the item that is different from the others, which is a common 'odd one out' format.

Question ID

QBVHWVQlK2S97PF6K0Wo-o

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