Letter pair series AM BN CO DP – UGC NET Question

In this sequence, the first letters A, B, C, D move forward by one letter each time. The second letters M, N, O, P also move forward by one letter. The next first letter after D is E, and the next second letter after P is Q, giving EQ. Thus EQ preserves the consistent +1 shift in both positions.

Option A:
Option A, ER, advances the second letter from P to R, a jump of two positions. The series, however, increases every letter by exactly one step. Since R overshoots the pattern, ER cannot be the correct continuation.

Option B:
Option B is correct because E and Q are each exactly one position ahead of D and P respectively. This keeps the relationship between terms simple and uniform. By maintaining the same step size for both letters, EQ fits the established pattern perfectly.

Option C:
Option C, FP, moves the first letter correctly from D to F only if the step were +2, which contradicts the +1 rule. It also keeps the second letter stuck at P. Because it distorts both components of the pattern, FP is not acceptable.

Option D:
Option D, FR, changes both letters with inconsistent jumps, advancing the first letter too far and the second letter by more than one step. The series shows no such uneven increments. As a result, FR does not satisfy the logical structure of the sequence.