Consider the sequence ABC__ABC_DABBCD_ABCD that follows a certain pattern.
Which one of the following completes the sequence?
A
DACB
B
CDAB
C
DCCA
D
DDCA
Correct Answer: Option D
Explanation
1. **Analyze Structure**: First, I count the total number of positions in the string `ABC__ABC_DABBCD_ABCD`, which is 20. Based on previous years' analysis (like 2019 and 2020),