The question has a series of small letters which follow a set pattern where…
2023
The question has a series of small letters which follow a set pattern where some letters are missing. The missing letters are given in their proper sequence in one of the alternatives. Find out the correct answer.
_ cb _ ca _ bacb _ ca _ bac _ d
- A.
bddddb
- B.
bbbddd
- C.
addddb
- D.
addbbb
Show answer & explanation
Correct answer: C
Concept: Letter-series questions like this hide a short block of letters that is repeated several times to build the full string, with a few letters blanked out at fixed spots. The method is to split the string into equal-length chunks, identify the recurring block(s) that generate every chunk, and then read the missing letters directly off the completed chunks.
Split the twenty-letter string into five chunks of four letters each, keeping the blank positions: (_, c, b, _), (c, a, _, b), (a, c, b, _), (c, a, _, b), (a, c, _, d).
The first, third and fifth chunks all follow the same four-letter block, and the second and fourth chunks follow a different four-letter block — so the sequence simply alternates between two recurring blocks.
Filling each chunk from its matching block and reading off the six blanked positions in left-to-right order reproduces the letters a, d, d, d, d, b — so addddb replaces the question marks.
Cross-check: writing out the complete string with these letters filled in gives acbd cadb acbd cadb acbd — every four-letter group matches one of the two recurring blocks with no exceptions, confirming the pattern holds throughout.