The verified answer to “In a certain code, HORSE is written as EHORS. How will MATH be written in that code?” is HMAT, option C. The source working states: Correct answer: HMAT (Option D). Apply the same unchanged rule to MATH: M→H, A→M, T→A, H→T. Therefore the required code is HMAT. Wrong options: NBUI is wrong because it does not reproduce the verified rule at every position; OCVJ is wrong because it does not reproduce the verified rule at every position; LZSG 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 HMAT. The alternatives OCVJ, LZSG and NBUI fail because at least one position does not obey the same transformation. A useful final check is to map HMAT backward through the inverse operation and confirm that the original target is recovered.