If A and B are two given sets, then `Ann(AnnB)^(@)` is equal to :

Options

A. A
B. B
C. `phi`
D. `AnnB^(@)`

Explanation

To solve the problem, we need to simplify the expression \( A \cap (A \cap B') \), where \( B' \) denotes the complement of set \( B \).

### Step-by-Step Solution:

1. **Understand the Expression**:
We start with the expression \( A \cap (A \cap B') \). Here, \( B' \) is the complement of set \( B \).

2. **Apply Associative Law**:
According to the associative law of intersection, we can rearrange the terms:
\[ A \cap (A \cap B') = (A \cap A) \cap B' \]

3. **Simplify \( A \cap A \)**:
The intersection of a set with itself is the set itself:
\[ A \cap A = A \]
Therefore, we can rewrite the expression as:
\[ A \cap B' \]

4. **Final Expression**:
The final simplified expression is:
\[ A \cap B' \]

5. **Conclusion**:
Thus, \( A \cap (A \cap B') = A \cap B' \).

### Answer:
The answer is \( A \cap B' \).