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Based on the English alphabetical order, three of the following four are alike in a certain way and thus form a group. Which is the one that 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.)
OSR
HLK
DGF
SWV
DGF
Calculate the alphabetical positions of the letters in each cluster. If the difference between the 1st and 2nd letter is equal to the difference between the 2nd and 3rd letter, it follows a pattern. The odd one out breaks this arithmetic sequence.
Calculate the alphabetical positions of the letters in each cluster. If the difference between the 1st and 2nd letter is equal to the difference between the 2nd and 3rd letter, it follows a pattern. The odd one out breaks this arithmetic sequence.
Analyze Cluster A (OSR)
O=15, S=19, R=18. Pattern: 15+4=19; 19-1=18. Logic: (+4, -1).
Analyze Cluster B (HLK) and D (SWV)
HLK: H=8, L=12, K=11. Logic: 8+4=12, 12-1=11 (+4, -1). SWV: S=19, W=23, V=22. Logic: 19+4=23, 23-1=22 (+4, -1).
Analyze Cluster C (DGF)
D=4, G=7, F=6. Pattern: 4+3=7, 7-1=6. Logic: (+3, -1). This is distinct from the (+4, -1) pattern of the others.
A: OSR follows the (+4, -1) pattern; B: HLK follows the (+4, -1) pattern; D: SWV follows the (+4, -1) pattern.
C is correct because DGF follows the (+3, -1) arithmetic pattern while all other options follow the (+4, -1) pattern.
In letter-cluster reasoning, always convert letters to their numerical positions (A=1, B=2... Z=26) first; differences between adjacent letters usually reveal the underlying hidden rule.
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