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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.)
PV - XR
DJ - LF
CH - MR
GM - OI
CH - MR
Convert each letter in both pairs to its alphabetical position (A=1 to Z=26) and check the sum or difference pattern between corresponding letters.
Convert each letter in both pairs to its alphabetical position (A=1 to Z=26) and check the sum or difference pattern between corresponding letters.
Analyze Option A (PV - XR)
P (16) to V (22) is +6. X (24) to R (18) is -6. Pattern is (+6, -6).
Analyze Option B (DJ - LF)
D (4) to J (10) is +6. L (12) to F (6) is -6. Pattern is (+6, -6).
Analyze Option C (CH - MR)
C (3) to H (8) is +5. M (13) to R (18) is also +5. The pattern is (+5, +5), which does not match the other pairs.
Analyze Option D (GM - OI)
G (7) to M (13) is +6. O (15) to I (9) is -6. Pattern is (+6, -6).
A: PV-XR follows the standard (+6, -6) position jump rule. B: DJ-LF follows the standard (+6, -6) position jump rule. D: GM-OI follows the standard (+6, -6) position jump rule.
C is correct because CH-MR follows the (+5, +5) pattern whereas all other pairs follow the (+6, -6) pattern.
When letter pairs or clusters show no direct Vowel/Consonant rule, immediately convert each letter to its numerical position (1 to 26) to find arithmetic differences.
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