Select the option that is related to the third term in the same way as the second term is related to the first term.
BLCM : FHGI :: KHWS : ?

Given: BLCM : FHGI :: KHWS : ?

Logic: 1st and 3rd letter is increasing by + 4 place and 2nd and 4th letter is decreasing by - 4 place.

B + 4 = F, L - 4 = H, C + 4 = G, M - 4 = I

Similarly,

K + 4 = O, H - 4 = D, W + 4 = A, S - 4 = O

The code is ODAO.

Thus, correct option is (d).