A letter series is given below in which some letters are missing. Select the option that gives the letters that can fill these blanks in that order.
a b _ a _ b a b _ a d _ a b c _ d b
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → cdcba
In a letter series with blanks, look for a block of letters that repeats; the blanks are then the letters the block needs at those places. The 18 places split into three blocks of six, each a b c a d b.
Block 1: a b _ a _ b needs c, d
Block 2: a b _ a d _ needs c, b
Block 3: a b c _ d b needs a
The series is abcadb abcadb abcadb, and the blanks in order are cdcba.