Four letter series with repeated first letter – UGC NET Question

Each group has the first three letters in strict consecutive order and the fourth letter repeats the first one. The sequences KLMK, LMNL, MNOM and NOPN show starting letters K, L, M and N moving one step forward each time. The next starting letter should therefore be O, and the first three letters become O, P and Q, with the fourth letter repeating O, giving OPQO.

Option A:
Option A, OPQP, begins with the correct three consecutive letters but ends with P, which repeats the second letter instead of the first. This violates the clear pattern that the final position mirrors the first letter. As a result, OPQP does not fit the established structure.

Option B:
Option B, PQOP, rearranges the letters so that the first three are no longer consecutive and the last letter is not a repetition of the first. It breaks both the ordering and the mirror condition of the groups. Therefore PQOP cannot be the correct continuation.

Option C:
Option C is correct because it keeps O, P and Q in consecutive order and then places O again in the fourth position. This continues the sequence of starting letters and respects the rule that the last letter must match the first. For these reasons, OPQO is the logical next term.

Option D:
Option D, NQPN, uses letters that do not form a simple consecutive run at the beginning and also fails to repeat the first letter at the end. The pattern of both order and repetition is lost, so NQPN does not align with the series.