Explanation:

The relationship between the first and second terms is determined by adding $3$ to the alphabetical position of each letter. For BGK to EJN: B (position $2$) $\xrightarrow{+3}$ E (position $5$); G (position $7$) $\xrightarrow{+3}$ J (position $10$); K (position $11$) $\xrightarrow{+3}$ N (position $14$). Applying this consistent rule to DSV: D (position $4$) $\xrightarrow{+3}$ G (position $7$); S (position $19$) $\xrightarrow{+3}$ V (position $22$); V (position $22$) $\xrightarrow{+3}$ Y (position $25$). Thus, DSV is related to GVY. Option (3) GVY is the correct answer as it perfectly adheres to the established $+3$ shift for each letter. Options (1) HUX, (2) ITW, and (4) HVZ do not follow this uniform $+3$ increment across all letter positions.