`A+B` means A is the brother of B, `A-B` means A is the mother of B and `AxxB` ,means A is the sister of B.Which of the following mean A is the maternal uncle of B?

Options

A. A+C+B
B. A-B+C
C. A+C-B
D. A+C`xx`B

Explanation

To determine which expression means "A is the maternal uncle of B," we need to analyze the given relationships step by step.

### Step-by-Step Solution:

1. **Understand the Symbols**:
- `A + B`: A is the brother of B.
- `A - B`: A is the mother of B.
- `A xx B`: A is the sister of B.

2. **Analyze Each Option**:
- **Option A: A + C + B**
- `A + C`: A is the brother of C.
- `C + B`: C is the brother of B.
- Conclusion: A, B, and C are all in the same generation (brothers), so this option is incorrect.

- **Option B: A - B + C**
- `A - B`: A is the mother of B.
- `B + C`: B is the brother of C.
- Conclusion: A is the mother of B, which does not indicate that A is the maternal uncle of B. This option is incorrect.

- **Option C: A + C - B**
- `A + C`: A is the brother of C.
- `C - B`: C is the mother of B.
- Conclusion: Since A is the brother of C and C is the mother of B, A is the maternal uncle of B. This option is correct.

- **Option D: A + B xx C**
- `A + B`: A is the brother of B.
- `B xx C`: B is the sister of C.
- Conclusion: This indicates that A and B are brothers and C is a sister, which does not establish A as the maternal uncle of B. This option is incorrect.

3. **Final Conclusion**:
- The correct expression that means "A is the maternal uncle of B" is **Option C: A + C - B**.