Select the option to maintain the relation on either side of ::
BDG : PRU :: LNQ : ?

Appeared in: RRB Staff Nurse Ahmedabad-2015

Explanation

The core logic is a consistent positional shift between letter groups.
The relationship between the first pair (BDG:PRU) is that each letter is shifted forward by 14 positions in the alphabet (B+14=P, D+14=R, G+14=U).
Applying this +14 shift to the second group (LNQ) yields ZBE (L+14=Z, N+14=B, Q+14=E).
When the sum of positions exceeds 26, the count wraps around from the beginning of the alphabet (e.g., 14+14 = 28, which is 26+2, so the 2nd letter, B).

Option A: FGI does not follow the +14 rule. The shifts from LNQ to FGI would be L-6=F, N-5=G, Q-8=I, which is not a consistent pattern.
Option B: TRS does not follow the +14 rule. The shifts from LNQ to TRS would be L+8=T, N+5=R, Q+2=S, which is not a consistent pattern.
Option C: MKI does not follow the +14 rule. The shifts from LNQ to MKI would be L+1=M, N-3=K, Q-6=I, which is not a consistent pattern.

Visual 1: Infographic: A chart showing the English alphabet with corresponding numerical positions (A=1, B=2, etc.) to help visualize the positional shifts.
Visual 2: Diagram: A circular diagram of the alphabet illustrating the 'wrap-around' concept for calculations that exceed 26.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning: Letter Analogy as background academic context rather than a clinical decision trigger.
While not a clinical question, the reasoning skills tested are crucial for nurses. Logical thinking is essential for interpreting patient data, prioritizing tasks, and troubleshooting problems in a clinical setting.
Nursing entrance and recruitment exams often include a General Intelligence or Aptitude section to assess these foundational cognitive skills.
What if the pattern was alternating, like +14, -2, +14? The nurse's ability to detect complex patterns is similar to recognizing subtle changes in a patient's condition or lab trends over time.

How to Approach the Question

First, identify the question type. This is a letter analogy problem, written as A:B :: C:D, where you must find D.
Convert the letters in the first pair (BDG and PRU) into their numerical positions in the alphabet.
Determine the mathematical relationship (e.g., addition, subtraction, multiplication) between the corresponding numbers. In this case, it's a consistent addition of 14.
Once the rule is confirmed, apply the exact same rule to the third letter group (LNQ).
Convert the resulting numbers back into letters. Remember to handle 'wrap-around' cases where the number exceeds 26.
Compare your result with the given options to find the correct answer.

Concept Tested & Keywords

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Practise the full RRB Staff Nurse Ahmedabad-2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.