Select the letter-cluster from among the given options that can replace the question
mark (?) in the following series.
OHA MFY KDW IBU ?
-
A.
SGZ
-
B.
GZS
-
C.
SZG
-
D.
GSZ
Correct Answer:
B. GZS
Explanation:
The series follows a pattern where each subsequent letter-cluster is formed by subtracting 2 from the first letter's position and adding 2 to the second and third letters' positions in the English alphabet. Specifically, for OHA, MFY, KDW, and IBU, the first letters follow the sequence O-M-K-I (15, 13, 11, 9), making the next first letter G (7). The second letters follow H-F-D-B (8, 6, 4, 2), making the next second letter Z (26). The third letters follow A-Y-W-U (1, 25, 23, 21), making the next third letter S (19). Therefore, the correct cluster to replace the question mark is GZS.
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