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Letter series type of questions usually consists of a series of small letters which follow a certain pattern. However, some letters are missing from the series. These missing letters are then given in a proper sequence as one of the alternatives. The candidate is requitred to choose this alternative as the answer.

In following questions, three sequence of alphabets/numerals are provided which correspond to each other in some way. Find out alphabets/numerals that come in the blank places.Choose the correct option

C B _ _ D _ B A B C C B _  _ 1 2 4 3  _ _ ? ? ? ? a _ a b _ c _ b _ _ _ _

Option:
A. 3, 4, 4, 3
B. 3, 2, 2, 3
C. 3, 1, 1, 3
D. 1, 4, 4, 1
Answer: C . 3, 1, 1, 3

Justification:

Comparing position of capital letters, numbers and small letters, as we find: 
a correspondes to C and 1 corresponds to a. So a and 1 corresponds to C.
b corresponds to A and 2 corresponds to b. So b and 2 corresponds to A.
Also, 4 corresponds to D.
So the remaining number i.e. 3 corresponds to B, So BCCB corresponds to 3, 1, 1, 3.

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