The pattern followed is that the alphabets are numbered alphabetically, A=1, B=2, C=3 and so on and then the first alphabet in each column is obtained by :
D=4 and N=14, => $$4+14=18\equiv R$$
V=22 and B=2, => $$22+2=24\equiv X$$
Similarly, L=12 and F=6, => $$12+6=18\equiv R$$
=> Ans - (B)
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