The verified answer to “In a certain code, GOLD is written as EMJB. How will SMART be written in that code?” is QKYPR, option C. The source working states: Correct answer: QKYPR (Option D). Apply the same unchanged rule to SMART: S→Q, M→K, A→Y, R→P, T→R. Therefore the required code is QKYPR. Wrong options: TNBSU is wrong because it does not reproduce the verified rule at every position; UOCTV is wrong because it does not reproduce the verified rule at every position; RLZQS is wrong because it does not reproduce the verified rule at every position. Even one mismatched position invalidates a code, so only Option D 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 QKYPR. The alternatives UOCTV, RLZQS and TNBSU fail because at least one position does not obey the same transformation. A useful final check is to map QKYPR backward through the inverse operation and confirm that the original target is recovered.