Study the given arrangement carefully and answer the question given below:
C U B A E D E D A B E B A U C D B C A D B D U B C A C B E D A
How many such pairs of alphabets are there in the series of alphabets given in BOLD in the above arrangement each of which has as many letters between them (in both forward and backward directions) as they have between them in the English alphabetical series?
1) None
2) One
3) Two
4) Three
5) More than three

Explanation

3