1)

Given below is a sequence in which some letters are missing .From the choices select the one that contains in order,the letters that can fill the blanks in the geiven series.
ab_ _ a_ _ d_bc_a_ _d


A) cdbcabbc

B) cdbcadbc

C) cdbacdbc

D) cdabcbcd

Answer:

Option B

Explanation:

abcd abcd abcd abcd 

the given series divided into four parts each of 4 letters.