Find the correct alternative:
BA_B_AAB_A_B

Options

A. AABB
B. BABB
C. BAAB
D. ABBA

Answer

To solve the question, we need to determine the correct letter to fill in the blanks represented by underscores in the sequence: BA_B_AAB_A_B.

Let's break down the steps:

1. **Identify the Pattern**: The sequence starts with "BA" and has alternating letters. We need to find a letter that fits into the blanks consistently throughout the sequence.

2. **Fill in the First Blank**:
- We have "BA_" which means we need to fill the first blank.
- Let's consider the options: A, B, C, D (we will evaluate these options).

3. **Evaluate Each Option**:
- **Option A (A)**: Filling in gives us "BAA". The sequence becomes "BAA_B_AAB_A_B". This creates a triple A, which is inconsistent with the original pattern.
- **Option B (B)**: Filling in gives us "BAB". The sequence becomes "BAB_B_AAB_A_B". This results in "BAB" and then "AAB", leading to an inconsistency in the number of A's.
- **Option C (B)**: Filling in gives us "BAB". The sequence becomes "BAB_B_AAB_A_B". This again leads to an inconsistency.
- **Option D (A)**: Filling in gives us "BAA". The sequence becomes "BAA_B_AAB_A_B". This also leads to inconsistencies.

4. **Continue Filling the Blanks**:
- After evaluating the first blank, we can see that none of the options fit well.
- Let's try filling in the second blank with the same letter we filled in the first blank to see if it creates a consistent pattern.

5. **Final Evaluation**:
- After testing all options, we find that the only consistent pattern occurs when we fill in the blanks with "B" and "A" in a way that maintains the alternating pattern.
- The sequence should ideally alternate between A's and B's.

6. **Conclusion**:
- The correct option that maintains the pattern without creating inconsistencies is filling in the blanks with "A" and "B" appropriately.

Thus, the correct alternative is option D.