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

Appeared in: RRB Staff Nurse Mumbai-2015

Explanation

The core concept is identifying a consistent mathematical pattern based on the alphabetical positions of letters within a group.
The pattern established in the first pair (BDG and PRU) and confirmed in the third term (LNQ) is that the second letter is 2 positions after the first, and the third letter is 3 positions after the second (+2, +3).
The letters in DFI are D (4th), F (6th), and I (9th).
The difference between D and F is +2 (4 + 2 = 6).
The difference between F and I is +3 (6 + 3 = 9).
Thus, DFI correctly follows the +2, +3 pattern.

Option A: The pattern in FGI is +1, +2 (F to G is +1, G to I is +2), which does not match the required +2, +3 pattern.
Option B: The pattern in TRS is -2, +1 (T to R is -2, R to S is +1). This involves moving backward and does not match the consistent forward progression of the required pattern.
Option C: The pattern in MKI is -2, -2 (M to K is -2, K to I is -2). This is a consistent backward pattern and does not match the required +2, +3 forward pattern.

Visual 1: Infographic: A chart showing the alphabet with corresponding numerical positions (A=1, B=2, etc.). This visual aid helps in quickly converting letters to numbers to solve such reasoning problems.

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.
This question tests logical and analytical reasoning, a fundamental skill for nursing professionals.
Nurses use deductive reasoning daily to analyze patient symptoms, interpret lab results, and make critical decisions about care plans.
Strong problem-solving skills, as tested here, are essential for troubleshooting equipment, managing complex medication schedules, and responding to emergencies effectively.

How to Approach the Question

First, recognize that this is a letter analogy question, where you need to find a hidden pattern.
Convert the letters in the first group (BDG) to their numerical positions in the alphabet (B=2, D=4, G=7).
Calculate the difference between consecutive numbers to find the internal pattern: 4 - 2 = +2; 7 - 4 = +3. The pattern is (+2, +3).
Verify this pattern in the other given groups (PRU and LNQ) to confirm the relationship.
Systematically test each of the four options by converting their letters to numbers and checking if they follow the same (+2, +3) pattern.
Select the option that is a perfect match for the identified pattern.

Concept Tested & Keywords

Q3mAOp8DeJODcwpr3n3jsC

Practise the full RRB Staff Nurse Mumbai-2015

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