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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? YUS, WSQ, UQO, SOM,?
QMK
QOL
RML
QKL
QMK
Look at each position independently across the terms. The first, second, and third letters each follow a consistent backward shift (-2) in the English alphabet.
Look at each position independently across the terms. The first, second, and third letters each follow a consistent backward shift (-2) in the English alphabet.
Analyze the first letters
Looking at the first letter of each term: Y (25), W (23), U (21), S (19). Each letter decreases by 2 positions. Continuing this pattern, 19 - 2 = 17, which corresponds to Q.
Analyze the second letters
Looking at the second letter of each term: U (21), S (19), Q (17), O (15). Each letter decreases by 2 positions. Continuing this pattern, 15 - 2 = 13, which corresponds to M.
Analyze the third letters
Looking at the third letter of each term: S (19), Q (17), O (15), M (13). Each letter decreases by 2 positions. Continuing this pattern, 13 - 2 = 11, which corresponds to K.
Combine the letters
Combining the derived letters Q, M, and K gives the final term QMK.
B: QOL is incorrect because the third letter does not follow the -2 pattern (O to L is -3). C: RML is incorrect as the first letter R does not follow the -2 sequence from S. D: QKL is incorrect as the second and third letter shifts do not match the -2 sequence.
A is correct because every letter in each consecutive three-letter cluster follows a strict backward shift of 2 positions in the English alphabet (YUS -> WSQ -> UQO -> SOM -> QMK).
When analyzing multi-letter series, always break down the sequence column-by-column (position-by-position) rather than trying to read the whole word as a single entity.
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