The verified answer to “In a certain code, DOG is written as FQI. The source working states: Correct answer: UJKR (Option B). Apply the same unchanged rule to SHIP: S→U, H→J, I→K, P→R. Therefore the required code is UJKR. Wrong options: TIJQ is wrong because it does not reproduce the verified rule at every position; RGHO is wrong because it does not reproduce the verified rule at every position; QFGN is wrong because it does not reproduce the verified rule at every position. Even one mismatched position invalidates a code, so only Option B is correct. This observation must be confirmed across every available letter position or every consecutive term before it is applied to the missing code. Applying the verified rule to the target expression produces UJKR. The alternatives RGHO, QFGN and TIJQ fail because at least one position does not obey the same transformation. A useful final check is to map UJKR backward through the inverse operation and confirm that the original target is recovered.