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 : aba _ baca _ ba _ bacaabac _ aca

A. cacb
B. ccab
C. cabc
D. abcc

Answer: Option A

Explanation:

The series is abac / baca / abac / baca / abac / baca.

Thus, the pattern abac, baca is repeated.