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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? FLB, IOE, LRH, OUK,?
RYM
RXN
RYN
RXM
RXN
Analyze the pattern column-by-column for each of the three letters in the given three-letter clusters.
Analyze the pattern column-by-column for each of the three letters in the given three-letter clusters.
Analyze First Letters
F (6) + 3 = I (9), I (9) + 3 = L (12), L (12) + 3 = O (15). Following this +3 pattern, O (15) + 3 = R (18).
Analyze Second Letters
L (12) + 3 = O (15), O (15) + 3 = R (18), R (18) + 3 = U (21). Following this +3 pattern, U (21) + 3 = X (24).
Analyze Third Letters
B (2) + 3 = E (5), E (5) + 3 = H (8), H (8) + 3 = K (11). Following this +3 pattern, K (11) + 3 = N (14).
Combine Letters
Combining the calculated letters R, X, and N gives the final term RXN.
A: RYM is incorrect because the third letter does not follow the +3 increment rule (K + 3 = N, not M). C: RYN is incorrect because the second letter is incorrect (U + 3 = X, not Y). D: RXM is incorrect because the third letter does not match K + 3 = N.
B is correct because each corresponding letter in the triplets advances by +3 positions in the English alphabet, yielding RXN.
For multi-letter cluster series questions, always analyze each position column independently before looking at the options.
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