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Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which pair 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.)
IG-EJ
RP-NS
OM-KP
MK-IO
MK-IO
Convert each letter to its alphabetical position. Check the difference between pairs: in three options the pattern is consistent, whereas the odd one out violates this rule.
Convert each letter to its alphabetical position. Check the difference between pairs: in three options the pattern is consistent, whereas the odd one out violates this rule.
Analyze Option A (IG-EJ)
I (9) to G (7) is -2. E (5) to J (10) is +5.
Analyze Option B (RP-NS)
R (18) to P (16) is -2. N (14) to S (19) is +5.
Analyze Option C (OM-KP)
O (15) to M (13) is -2. K (11) to P (16) is +5.
Analyze Option D (MK-IO)
M (13) to K (11) is -2. I (9) to O (15) is +6, which breaks the established pattern of +5.
A: Follows the standard -2, +5 pattern. B: Follows the standard -2, +5 pattern. C: Follows the standard -2, +5 pattern.
D is correct because MK-IO follows a -2, +6 pattern whereas the other three pairs follow a -2, +5 pattern.
Always verify positional differences for all parts of letter-cluster pairs in logical reasoning questions.
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