In each of the following questions, select the related letter from the given alternatives.
ABCD : QRST : : BACD : ?
Now let us find relation between ABCD:QRST and apply the same to the next .
ABCD:QRST
changes are taken place in this way given below
A→Q ,
B→R
C→S
D→T
And the Relation is
A=Q Simillarly
B=R
C=S
D=T
This the relation and applying it to the next BACD:?
B=R
A=Q
C=S
D=T
Ans is BACD:RQST
Option A is correct