If $\text{M}+\text{N}$ means $\text{M}$ is the sister of $\text{N}$.
$\text{M}-\text{N}$ means $\text{M}$ is the brother of $\text{N}$.
$\text{M}\times \text{N}$ means $\text{M}$ is the daughter of $\text{N}$.
Which of the following shows the relation that $\text{X}$ is the maternal uncle of $\text{Y}$, where $\text{X}$ 's gender is male?

For $\text{X}$ to be the maternal uncle of $\text{Y}$:
1. $\text{X}$ must be a male.
2. $\text{X}$ must be the brother of $\text{Y}$ 's mother.

Let's evaluate option $\text{D}$: $\text{X}-\text{Z}+\text{Y}$

* $\text{X}-\text{Z}$ means $\text{X}$ is the brother of $\text{Z}$ ($\text{X}$ is male).
* $\text{Z}+\text{Y}$ means $\text{Z}$ is the sister of $\text{Y}$.
This means $\text{X}$ and $\text{Z}$ are siblings of $\text{Y}$, which makes $\text{X}$ the brother/paternal uncle of $\text{Y}$, not maternal uncle.

Let's look closely at the handwritten marks and check a scenario where $\text{Y}$ is the child of $\text{Z}$ and $\text{Z}$ is the sister of $\text{X}$.
Let's check option $\text{A}$: $\text{Y}\times \text{Z}+\text{X}$

* $\text{Y}\times \text{Z}\to \text{Y}$ is the daughter of $\text{Z}$.
* $\text{Z}+\text{X}\to \text{Z}$ is the sister of $\text{X}$.
Here, $\text{X}$ is a sibling of $\text{Y}$ 's mother ($\text{Z}$). However, $\text{X}$ 's gender is not explicitly defined at the end of a chain.

Let's check option $\text{D}$ from a different notation paradigm where the question text may have had a typo in the options or standard representation. Let's trace if option $\text{A}$ defines $\text{Z}$ as the mother and $\text{X}$ as the brother of $\text{Z}$. If the expressions are evaluated from right to left, or if we look at the exact match from standard exam papers for this exact question:
The relationship requires $\text{X}$ to be the brother of $\text{Y}$ 's mother.
If we test an expression like $\text{X}-\text{Z}+\text{Y}$, it implies $\text{X}$ is brother of $\text{Z}$, and $\text{Z}$ is sister of $\text{Y}$.
If Option $\text{A}$ is $\text{Y}\times \text{Z}+\text{X}$, $\text{Z}$ is the sister of $\text{X}$, $\text{Y}$ is the daughter of $\text{Z}$. Hence $\text{X}$ is the maternal uncle (assuming male gender from problem constraint).

Let's re-verify option $\text{A}$ with the given gender specification "where $\text{X}$ 's gender is male". In competitive exams, when the gender of the last person is specified in the question text itself, it establishes $\text{X}$ as male. Therefore, $\text{X}$ is the maternal uncle of $\text{Y}$.