Letter-series completion – fill the single missing letter in each 4-letter pattern so that every string becomes the complete alphabet run K L M N: K L M _ , K L _ N , K _ M N , _ L M N Which option best represents the single 4-letter sequence that logically fits each blank to produce KLMN in all four cases?

Introduction / Context:
This is a classic letter-series completion problem focused on short, ordered runs of the English alphabet. Each partial 4-letter string is missing exactly one position. The goal is to determine the same 4-letter sequence that, when considered against each pattern, fills the single gap so that all four strings resolve to one consistent ordered set, namely K L M N. Such questions test pattern recognition, position mapping, and the ability to generalize a single rule across multiple similar subproblems.

Given Data / Assumptions:

• Patterns: "K L M _", "K L _ N", "K _ M N", "_ L M N".
• We assume standard left-to-right alphabetic order without skipping letters.
• Exactly one character is missing in each pattern.

Concept / Approach:
The target structure appears to be the continuous ordered run K L M N. In each 4-letter fragment, a distinct position is blank. If the intended complete word is K L M N, then the missing characters are, respectively, N, M, L, and K in the first through fourth fragments. However, the option that best captures the intended completion across all four is the full ordered word that every fragment aspires to form: "KLMN". This reflects the canonical arrangement to which each partial string is converging when its unique blank is supplied by the correct letter at the correct position.

Step-by-Step Solution:

Verification / Alternative check:
All four completions yield exactly K L M N. No other permutation can satisfy all four fragments simultaneously while preserving strict alphabetic order.

Why Other Options Are Wrong:

Common Pitfalls:
Attempting to read each fragment independently with different targets; the question requires a single consistent ordered word across all fragments.

Final Answer:
KLMN