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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? YZX, VWU, STR, PQO, MNL,?
KJI
CBA
IJK
JKI
JKI
Observe the backward alphabetical movement for each letter in the triplet (-2, -2, -2) and also check the cyclical order within the triplet itself.
Observe the backward alphabetical movement for each letter in the triplet (-2, -2, -2) and also check the cyclical order within the triplet itself.
Analyze the first letters of each triplet
The first letters are Y (25), V (22), S (19), P (16), M (13). Each term decreases by 3. Continuing this: 13 - 3 = 10, which corresponds to J.
Analyze the second letters of each triplet
The second letters are Z (26), W (23), T (20), Q (17), N (14). Each term decreases by 3. Continuing this: 14 - 3 = 11, which corresponds to K.
Analyze the third letters of each triplet
The third letters are X (24), U (21), R (18), O (15), L (12). Each term decreases by 3. Continuing this: 12 - 3 = 9, which corresponds to I.
Combine the letters to form the final term
Combining the calculated letters J, K, and I gives the final triplet JKI.
A: KJI has incorrect internal ordering. B: CBA is completely unrelated to the backward step-3 sequence. C: IJK follows an ascending order instead of the required backward shift.
D is correct because each letter in the triplet decreases by 3 positions in alphabetical order, giving J, K, and I which forms JKI.
Always verify both the inter-triplet gap (between consecutive groups) and intra-triplet relationship (within the same group) to avoid positional traps.
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