a _ cdaab _ cc _ daa _ bbb _ ccddd - Letter Series - Series Completion - Verbal Reasoning question

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - a _ cdaab _ cc _ daa _ bbb _ ccddd

A. bdbda

B. bddca

C. dbbca

D. bbdac

E. None of the above

Answer: D. bbdac

The series is abca / aabbccdd / aaabbbcccddd.
Thus, each letter of first sequence is repeated two times in the second sequence and three times in the third sequence.

Posted in: Letter Series - Series Completion - Verbal Reasoning