Select the combination of letters that, when placed in the blanks of the given letter series in order, will complete the series.
s _ f t _ e q _ r f _ a e _ s r _ t a _ q
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → rastqfe
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 21 places split into three blocks of seven, each s r f t a e q.
Block 1: s _ f t _ e q needs r, a
Block 2: _ r f _ a e _ needs s, t, q
Block 3: s r _ t a _ q needs f, e
The series is srftaeq srftaeq srftaeq, and the blanks in order are rastqfe.