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Which of the following options should come in place of the question mark (?) in the given series based on the English alphabetical order? HLA, BFU, VZO, PTI,?
JMB
JNC
JMC
JNB
JNC
Analyze the position changes of each letter column-by-column across terms. Usually, each position follows an arithmetic sequence (+N or -N) in alphabetical order.
Analyze the position changes of each letter column-by-column across terms. Usually, each position follows an arithmetic sequence (+N or -N) in alphabetical order.
Analyze First Letters
H (8), B (2), V (22), P (16). Each step decreases by 6: 8 - 6 = 2 (B), 2 - 6 = 22 (V), 22 - 6 = 16 (P), 16 - 6 = 10 (J).
Analyze Second Letters
L (12), F (6), Z (26), T (20). Each step decreases by 6: 12 - 6 = 6 (F), 6 - 6 = 26 (Z), 26 - 6 = 20 (T), 20 - 6 = 14 (N).
Analyze Third Letters
A (1), U (21), O (15), I (9). Each step decreases by 6: 1 - 6 = 21 (U), 21 - 6 = 15 (O), 15 - 6 = 9 (I), 9 - 6 = 3 (C).
Combine Results
Combining the calculated letters (10th = J, 14th = N, 3rd = C) gives JNC.
A: JMB has incorrect 2nd and 3rd letters. C: JMC has incorrect 2nd letter. D: JNB has incorrect 3rd letter.
B is correct because all three letter positions follow a consistent backward shift pattern of minus 6 (-6) across consecutive terms, yielding JNC.
When analyzing multi-letter series, always examine each position (1st, 2nd, 3rd) independently, as they often follow separate or uniform arithmetic progressions.
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