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Question

In the following triads, each group of letters is related to the subsequent one following a certain logic. Select from the given options, the one which follows the same logic.

LUNG - UNLG - GNUL
FERN - ERFN - NREF

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
COIR - OICR - RIOC

The question asks to identify the triad that follows the same logical transformation pattern as the given examples: LUNG - UNLG - GNUL and FERN - ERFN - NREF.

Understanding the Logic Pattern

By analyzing the letter transformations in the provided examples, two distinct rearrangement rules are identified:

First Transformation (Word 1 -> Word 2)

The letters of the first word are rearranged according to the positions 2, 3, 1, 4 to form the second word.

Original Position 1 2 3 4
New Position Sequence 2 3 1 4

Example: LUNG -> U N L G

Second Transformation (Word 2 -> Word 3)

The letters of the second word are rearranged according to the positions 4, 2, 1, 3 to form the third word.

Original Position 1 2 3 4
New Position Sequence 4 2 1 3

Example: UNLG -> G N U L

Applying the Logic to Options

We will now check each option against these two transformation rules:

Option 1: COIR - OICR - RIOC

  • Word 1 to Word 2: COIR -> OICR. Applying 2 3 1 4 gives O I C R. (Matches)
  • Word 2 to Word 3: OICR -> RIOC. Applying 4 2 1 3 gives R I O C. (Matches)

This option perfectly follows the established logic.

Option 2: SWAP - SAWP - PAWS

  • Word 1 to Word 2: SWAP -> SAWP. Applying 2 3 1 4 gives W A S P. (Does not match SAWP)

Option 3: BAKE - AKBE - AKEB

  • Word 1 to Word 2: BAKE -> AKBE. Applying 2 3 1 4 gives A K B E. (Matches)
  • Word 2 to Word 3: AKBE -> AKEB. Applying 4 2 1 3 gives E K A B. (Does not match AKEB)

Option 4: CUTS - UCTS - SUTC

  • Word 1 to Word 2: CUTS -> UCTS. Applying 2 3 1 4 gives U T C S. (Does not match UCTS)

Only Option 1 adheres to both transformation rules derived from the examples.

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Important Questions from Series

  1. Select the option figure in which the given figure (X) is embedded (rotation is NOT allowed).

  2. Identify the figure given in the options which when put in place of ? will logically complete the series.

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    (C) When each term in the series (except the first) denotes a class having fewer members than the class denoted by the term preceding it.

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    Choose the most appropriate answer from the options given below :

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