If `X+Y` means, X is sister of Y
`X*Y` means, X is daughter of Y
`X-Y` means Y is brother of X
Which of the following shows the relation that Z is the maternal uncle of S?

Options

A. `S+TxxZ`
B. `S-TxxZ`
C. `S*T-Z`
D. `S*T+Z`

Answer

To determine which option shows that Z is the maternal uncle of S, we need to analyze the relationships described by the symbols and the options provided. Let's break it down step by step.

### Step 1: Understand the Symbols
- **X + Y** means X is the sister of Y.
- **X * Y** means X is the daughter of Y.
- **X - Y** means Y is the brother of X.

### Step 2: Analyze Each Option
We will analyze the options one by one to find the correct representation of the relationship where Z is the maternal uncle of S.

#### Option 1: S + T * Z
1. **S + T**: This means S is the sister of T.
2. **T * Z**: This means T is the daughter of Z.
- However, we don't know the relationship between S and Z from this option, so we cannot conclude that Z is the maternal uncle of S.

#### Option 2: S * T * Z
1. **S * T**: This means S is the daughter of T.
2. **T * Z**: This means T is the daughter of Z.
- Again, we cannot determine the relationship between Z and S from this option, so it is not valid.

#### Option 3: S * T - Z
1. **S * T**: This means S is the daughter of T.
2. **T - Z**: This means Z is the brother of T.
- Here, since Z is the brother of T and S is the daughter of T, Z is indeed the maternal uncle of S.

#### Option 4: S - T + Z
1. **S - T**: This means T is the brother of S.
2. **T + Z**: This means Z is the sister of T.
- This does not establish Z as the maternal uncle of S.

### Conclusion
From the analysis, **Option 3 (S * T - Z)** correctly shows that Z is the maternal uncle of S.