Study the given arrangement carefully and answer the question given below:
D U B C A B E D C A B U D C B A E D B C A D E B A U C D A E B
How many meaningful words can be formed with the alphabets which are first, second, fifth, and sixth from the right end of the above arrangement?
1) None
2) One
3) Two
4) Three
5) More than three

Explanation

2