Which letter-cluster will replace the question mark (?) in the following series?
GXB, JVD, MTF, PRH, ?
Using conversion table,
$$GXB=7+24+2=33.$$
$$JVD=10+22+4=36.$$
$$MTF=13+20+6=39.$$
$$PRH=16+18+8=42.$$
Similarly, $$SPJ=19+16+10=45.$$Â
So, 33,36,39,42,45 is in a series.
B is correct choice.
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