Select the combination of letters that, when placed in the blanks of the given letter series in order, will complete the series.
b _ c c d _ b b c _ d d b _ c c d d
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → bdcb
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 b b c c d d.
Block 1: b _ c c d _ needs b, d
Block 2: b b c _ d d needs c
Block 3: b _ c c d d needs b
The series is bbccdd bbccdd bbccdd, and the blanks in order are bdcb.