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

   DMV

2. B

   BDM

3. C

   MVE

4. D

   BKT

Appeared in: Bihar NHM CHO-2025

Explanation

• The letter-clusters DMV, MVE, and BKT all follow a consistent mathematical pattern based on their alphabetical positions.
• In these three clusters, each letter is exactly 9 positions ahead of the letter preceding it.
• The cluster BDM does not follow this rule; the difference between the first two letters (B and D) is 2, not 9.
• This break in the established pattern makes BDM the odd one out.

Why Other Options Were Wrong

• Option A: This option is incorrect because it follows the common pattern. The difference between D(4) and M(13) is 9, and the difference between M(13) and V(22) is also 9. The pattern is (+9, +9).
• Option C: This option is incorrect because it follows the common pattern, including an alphabetical wrap-around. The difference between M(13) and V(22) is 9. The difference between V(22) and E(5) is also 9 (22 + 9 = 31; 31 - 26 = 5). The pattern is (+9, +9).
• Option D: This option is incorrect because it follows the common pattern. The difference between B(2) and K(11) is 9, and the difference between K(11) and T(20) is also 9. The pattern is (+9, +9).

Related Visual

• Visual 1: Table - A table showing the alphabetical position of each letter and the calculated difference for all four options. This helps visualize the consistent '+9, +9' pattern in the distractors versus the '+2, +9' pattern in the correct answer.

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning - Odd One Out (Letter Series) as background academic context rather than a clinical decision trigger.
• While this is not a clinical question, the analytical and pattern-recognition skills tested are crucial for nurses.
• Nurses use pattern recognition daily to interpret vital sign trends, lab results, and changes in a patient's condition to identify potential problems early.
• What if the question was about recognizing a pattern in a patient's fever spikes or blood sugar readings? The same logical process of identifying a baseline pattern and spotting deviations would apply to make critical clinical decisions.

How to Approach the Question

• First, identify the question type. This is an 'odd one out' problem using letter clusters, which is a common type of logical reasoning question.
• The core task is to find a common rule or pattern that applies to three of the options, and then identify the one option that breaks this rule.
• A standard approach for letter-based puzzles is to convert letters to their numerical positions in the alphabet (A=1, B=2, etc.).
• For each option, calculate the difference between the numerical values of consecutive letters.
• Compare the resulting numerical patterns across all four options.
• The option with a unique pattern that does not match the others is the correct answer.

Concept Tested & Keywords

• Concept Tested: Logical Reasoning - Odd One Out (Letter Series)
• Stem keywords: English alphabetical order, letter-clusters, alike, does not belong
• Lead-in keywords: DOES NOT
• Negative lead-in flag: The question asks to find the option that DOES NOT belong to the group.

Question ID

QK4IzGb-Ds2MSsJWIs1YgS

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