In the following series of letter pairs, one pair is missing. Choose the pair that best continues the pattern: DM, EN, FO, ?

Introduction / Context:
This is a straightforward alphabet series involving pairs of letters that both advance through the alphabet at the same rate. The question checks your comfort with letter positions and your ability to extend a simple pattern of increments.

Given Data / Assumptions:

• Given pairs: DM, EN, FO, ? • English alphabet positions are used: A = 1 to Z = 26. • Both letters within each pair change regularly from one term to the next. • The same increment is applied between corresponding letters of consecutive pairs.

Concept / Approach:
The simplest way to handle such a pattern is to examine each position separately. We look at the first letters D, E, F, then at the second letters M, N, O, and see how they move. If both sequences add one position each time, then the next pair is formed by adding one step to each letter.

Step-by-Step Solution:
Step 1: Convert first letters to numeric positions. D = 4, E = 5, F = 6. We add 1 at each step: 4 → 5 → 6, so the next first letter is 6 + 1 = 7, which is G. Step 2: Convert second letters to numeric positions. M = 13, N = 14, O = 15. Again, we add 1 each time: 13 → 14 → 15, so the next second letter is 15 + 1 = 16, which is P. Step 3: Combine the letters G and P to obtain the pair GP.

Verification / Alternative check:
Rewriting the sequence: DM, EN, FO, GP, both positions show consistent +1 steps. First letters are D, E, F, G; second letters are M, N, O, P. This smooth progression confirms that GP is correct. None of the other options uses a first letter directly after F and a second letter directly after O at the same time.

Why Other Options Are Wrong:
• FG: This does not preserve the pairing style, and the second letter G is far earlier in the alphabet than expected after O. • HI: Both letters H and I are ahead of what the pattern requires and do not align with the immediate next positions after D and M. • HP: H is too far ahead in the first letter sequence, even though P is correct for the second letter.

Common Pitfalls:
A typical mistake is to recognize the pattern in only one letter of the pair and then choose an option that fits this half pattern but breaks the other half. Always verify that both letters in the pair align with the expected progressions.

Final Answer:
The pair that correctly continues the sequence is GP.