Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
- 
					 a_b_c_a_bc_b_cb
- 
                        - ccbcca
- ccaccb
- cacabc
- acbcab
 
Correct Option: A
As per given question, the letter series is following the below pattern.
a c b c c b 
After using the pattern the complete letter series will be as below.
a c b c c b /  a c b c c b / a c b 
 
	