Choose the pair of words/letters in the answer choices that best expresses a relationship similar to that expressed in the original pair:\n
$$\text{ABC}:\text{ZYX}::\_\_\_\_\_\_\_\_\_\_$$

Let's analyze the baseline rule connecting $\text{ABC}$ to $\text{ZYX}$:
Each letter is mapped directly onto its opposite reverse alphabet positional letter pair position ($27-\text{position}$):

* $\text{A}(1)⟷\text{Z}(26)$
* $\text{B}(2)⟷\text{Y}(25)$
* $\text{C}(3)⟷\text{X}(24)$

Let's evaluate option B ($\text{BCD}:\text{YXW}$):

* $\text{B}(2)⟷\text{Y}(25)$ because $2+25=27$
* $\text{C}(3)⟷\text{X}(24)$ because $3+24=27$
* $\text{D}(4)⟷\text{W}(23)$ because $4+23=27$

This perfectly preserves the reverse pairs logic.