Explanation: In this problem, we are presented with a sequence of letter groups: AEFG, BHIJ, ..., DNOP. The task is to identify the missing group in the sequence. To solve this, we need to understand the pattern governing the sequence.
The sequence is composed of groups of four consecutive letters. The first group is AEFG, the second is BHIJ, and the fourth is DNOP. We need to determine the third group.
Let's analyze the pattern:
1. The first letter of each group shifts by one position in the alphabet.
2. The relative positions of the letters within each group remain the same.
Starting with AEFG:
- A is the starting letter.
- The next three letters are E, F, and G, which are consecutive letters following A.
Moving to BHIJ:
- B is the starting letter, which is one position after A.
- The next three letters are H, I, and J, which are consecutive letters following B.
Following this pattern, the next group should start with C (one position after B) and the next three letters should be consecutive letters following C. Therefore, the next group is CKLM:
- C is the starting letter.
- The next three letters are K, L, and M, which are consecutive letters following C.
Finally, the fourth group is DNOP:
- D is the starting letter, which is one position after C.
- The next three letters are N, O, and P, which are consecutive letters following D.
Thus, the correct sequence is AEFG, BHIJ, CKLM, DNOP. The missing group is CKLM, which corresponds to option C.
This problem tests the ability to recognize and apply a pattern in a sequence of letter groups. It is important to carefully observe the starting letter of each group and the relative positions of the letters within the group to identify the correct pattern.