Question

Select the correct option that will fill in the blank and complete the series.

AB, BA, AAB, BAA, ____, BBAA, AAABB

1. AAAB
2. BBAA
3. AABB
4. AABBB

Answer 1

Correct Answer - Option 3 : AABB

Pattern follows here is:

AB, BA, AAB, BAA, AABB, BBAA, AAABB

The positions of set of letter A and B interchange in every next term and the number of letter A and B are increasing alternatively after every two terms.

Hence, the correct answer is AABB.