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

Answer: B. 1, 4, 3, 4

Clearly, 2 corresponds to A.
Now, b corresponds to C and 4 corresponds to b.
So, 4 corresponds to C.
c corresponds to D and 3 corresponds to c.
So, 3 corresponds to D.
So, the reamaining number  i.e.,  1 corresponds to B.
Thus, BCDC corresponds to 1, 4, 3, 4.