Question

Which sequence of letters when placed in the blanks one after the other will complete the given letter series ?

a _ b a a _ a a _ _ a b

• A. a a a a
• B. b a a a
• C. b b a a
• D. a b b a

Answer 1

The correct option is D a b b a

Option (D) is the correct answer.
Explanation
Let us distribute the letter series in equal parts
a _ b/ a a _ /a a _/ _ a b

The series formed is a a b/ a a b /a a b/ a a b.

Clearly, we can conclude from the above series that the term a a b is repeated.
So, 'abba' is the missing term.
Hence, option D is correct.