In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
ab _ aa _ caab _ c _ abb _ c
Option:
A. bbcaa
B. bcbca
C. cabac
D. cbbac
Answer: D . cbbac
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Justification:
The series is abc / aabc / aabbc / aabbcc.
First all the letters occur once, then a occurs twice, then both a and b occur twice and finally all the three letters appear twice.
