Correct option is B
Given - ARC is coded as '1-18-3' and 'BOY' is coded as '2-15-25
Logic - place values of the letters

ARC is coded as '1-18-3' (place values of the letters)
'BOY' is coded as '2-15-25'
Similarly,
'FAD = 6 - 1 - 4
hence option b is correct.