The verified answer to “In a certain code, GAME is written as HBNF. How will CHAIR be written in that code?” is DIBJS, option D. The source working states: Correct answer: DIBJS (Option A). Apply the same unchanged rule to CHAIR: C→D, H→I, A→B, I→J, R→S. Therefore the required code is DIBJS. Wrong options: EJCKT is wrong because it does not reproduce the verified rule at every position; BGZHQ is wrong because it does not reproduce the verified rule at every position; AFYGP is wrong because it does not reproduce the verified rule at every position. Even one mismatched position invalidates a code, so only Option A 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 DIBJS. The alternatives EJCKT, BGZHQ and AFYGP fail because at least one position does not obey the same transformation. A useful final check is to map DIBJS backward through the inverse operation and confirm that the original target is recovered.