Select the combination of letters that, when placed in the blanks of the given letter series in order, will complete the series.
a _ b b c _ c b _ c a _ b _ c
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → cabcb
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 15 places split into three blocks of five, each a c b b c.
Block 1: a _ b b c needs c
Block 2: _ c b _ c needs a, b
Block 3: a _ b _ c needs c, b
The series is acbbc acbbc acbbc, and the blanks in order are cabcb.