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.)

Question

Question

This question was previously asked in

RRB NTPC Graduate Level CBT-I Official Paper (Held On: 05 Jun, 2025 Shift 1)

Answer 1

The logic followed in this pattern is based on alphabetical shifts between consecutive letters within each cluster.

For 'ECG':

E	→	C	→	G
	-2		+4

For 'SQU':

S	→	Q	→	U
	-2		+4

For 'LJN':

L	→	J	→	N
	-2		+4

For 'POR':

P	→	O	→	R
	-1		+3

Thus, the letter-cluster that DOES NOT belong to that group is " POR".

Hence, the correct answer is "Option 4".