Study the following arrangement carefully and answer the questions.
C E B A C D B C D A C E B E D C A B A D A C E D U B A U B D B U
How many pairs of alphabets are there in the series of alphabets given in BOLD (D to C) in the given arrangement each of which as many letters between them ( in both forward and backward directions ) as they have between them in English alphabetical series ?
In forward direction: BC, CD, B-C-D
In Backward direction: C-D-A
Hence, answer will be E
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