In a code language, 'OFFICE' is coded as ‘118’ and 'BLACK' is coded as '106'. How will ‘PLUME’ be coded in that language?

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Logic: Reverse rank of letters are added.

OFFICE=12+21+21+18+24+22=118

And

BLACK=25+15+26+24+14=106

Therefore,

PLUME=11+15+6+14+22=68 

Thus, correct option is (a).