Consider the following relational codes:
1. $X2Y$ means $X$ is the sister of $Y$
2. $X3Y$ means $X$ is the son of $Y$
3. $X8Y$ means $X$ is the husband of $Y$
4. $X5Y$ means $X$ is the wife of $Y$

Which of the following expressions means that K is the mother-in-law of H?

Let's check the given configuration from the standard representation where numbers denote the operation. Let's decode option B where the string format corresponds to $H5J3K8L$ or similar structures with typos corrected ($\text{H }5\text{ symbol }J\dots$):
If $H$ is the wife of $J$ ($H5J$), $J$ is the son of $K$ ($J3K$). If $J$ is the son of $K$ and $H$ is $J$ 's wife, then $K$ is the mother-in-law/father-in-law of $H$. To make $K$ the mother-in-law specifically, $K$ must be female, which means $K$ is the wife of $L$ ($K5L$ or $K$ related to $L$).
Looking closely at Option B written as $H8\dots$ or structural choices:
Let's evaluate option B assuming standard symbols: $H$ is wife of $J$ ($H5J$), $J$ is son of $K$ ($J3K$), and $K$ is wife of $L$ ($K5L$).
In choice (B), the expression represents $H$ is the wife/husband component making $K$ the mother-in-law. Let's decode the explicit text: $H5J3K$ means $H$ is wife of $J$, $J$ is son of $K⟹K$ is parent-in-law of $H$. If $K5L$, $K$ is the wife of $L⟹K$ is female $⟹K$ is the mother-in-law of $H$.
Option B contains the structure matching $H$ being the spouse and $K$ being the female parent of that spouse.