Given below is a pair of words/letters/numbers separated by a colon and followed by four answer choices. Choose the pair of words in the answer choices that best expresses a relationship similar to that expressed in the original pair.
ABC: ZYX::

The relationship in ABC : ZYX relies on pairs of opposite letters from the beginning and the end of the alphabet:
* A is the $1\text{st}$ letter from the beginning, Z is the $1\text{st}$ from the end.
* B is the $2\text{nd}$ letter from the beginning, Y is the $2\text{nd}$ from the end.
* C is the $3\text{rd}$ letter from the beginning, X is the $3\text{rd}$ from the end.

Applying the same rule to BCD:

* B $\to$ Y
* C $\to$ X
* D $\to$ W
Thus, BCD matches with YXW.