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 : ac _ cab _ baca _ aba _ acac

A. aacb
B. acbc
C. babb
D. bcbb

Answer: Option A

Explanation:

The series is acac / abab / acac / abab / acac.

Thus, the pattern acac, abab is repeated.