Correct Answer: YOIC

Solution : Let's check the options –
First option: BDFH; B + 2 = D; D + 2 = F; F + 2 = H
Second option: JLNP; J + 2 = L; L + 2 = N; N + 2 = P
Third option: YOIC; Y – 10 = O; O – 6 = I; I – 6 = C
Fourth option: RTVX; R + 2 = T; T + 2 = V; V + 2 = X

So, the third option is different from the other three options because the difference in the position value of the letters is different . Hence, the third option is correct.