In the triplet series ZBJ, YCK, XDL, ?, which of the following triplets should come next to continue the pattern?

Introduction / Context:
The triplet series ZBJ, YCK, XDL, ?, uses three letter groups that change in a very systematic way. Each of the first, second, and third letters follows its own step by step pattern, with first letters moving backward, second letters moving forward, and third letters also moving forward. This type of structured pattern is common in alphabet test questions.

Given Data / Assumptions:

• Given triplets: ZBJ, YCK, XDL, ?
• Alphabet positions A 1 to Z 26.
• We separate the first letters, second letters, and third letters into three sequences.

Concept / Approach:
We consider first letters Z, Y, X, ?, second letters B, C, D, ?, and third letters J, K, L, ?. Each of these three sequences shows a constant step progression. Once we determine the step for each column, we can compute the next letter in that column and combine them to get the missing triplet.

Step-by-Step Solution:
Step 1: First letters are Z, Y, X. Step 2: Positions: Z 26, Y 25, X 24. Step 3: The step is minus 1 each time. Step 4: The next first letter is 24 minus 1 equals 23, which is W. Step 5: Second letters are B, C, D. Step 6: Positions: B 2, C 3, D 4, which increase by 1 each time. Step 7: The next second letter is 4 plus 1 equals 5, which is E. Step 8: Third letters are J, K, L. Step 9: Positions: J 10, K 11, L 12, again increasing by 1 each step. Step 10: The next third letter is 12 plus 1 equals 13, which is M. Step 11: Combining these results, the next triplet is WEM.

Verification / Alternative check:
Write the full sequence including WEM: ZBJ 26,2,10; YCK 25,3,11; XDL 24,4,12; WEM 23,5,13. The first column follows 26, 25, 24, 23 with step minus 1, and the second and third columns follow 2,3,4,5 and 10,11,12,13 respectively, with step plus 1. No other choice in the options matches these three independent progressions simultaneously.

Why Other Options Are Wrong:
VMW has first letter V 22 instead of W 23 and third letter W 23 instead of M 13, so all column patterns are broken. WDM has the correct first letter W but uses D and M instead of E and M, disrupting the second column sequence. WFM and XEM similarly fail to keep both the second and third columns on a consistent plus 1 pattern.

Common Pitfalls:
Some learners only look at one of the columns, for example noticing the J, K, L pattern in the third letters and picking any option with M as the third letter, without checking the first and second letters. Another pitfall is to think the series naturally stops at Z and ignore that the pattern continues smoothly backward from Z. Always examine all three letter positions before deciding.

Final Answer:
The triplet that correctly continues the series is WEM.