Correct Answer: EIMPSW

Solution : Let's check each option –
First option: BFJNRV; B + 4 = F, F + 4 = J, J + 4 = N, N + 4 = R, R + 4 = V
Second option: CGKOSW; C + 4 = G, G + 4 = K, K + 4 = O, O + 4 = S, S + 4 = W
Third option: DHLPTX; D + 4 = H, H + 4 = L, L + 4 = P, P + 4 = T, T + 4 = X
Fourth option: EIMPSW; E + 4 = I, I + 4 = M, M + 3 = P, P + 3 = S, S + 4 = W

So, the fourth option is different from the other three options because the difference in the positional values of the letters is different. Hence, the fourth option is correct.