1.  In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative : _ bcdbc _ dcabd _ bcdbc _ dc _ bd

A. aaaaa
B. ccccc
C. bbbbb
D. ddddd

Answer: Option A

Explanation:

The series is abcd / bcad / cabd / abcd / bcad / cabd.

Thus, the pattern abcd / bcad / cabd is repeated twice.