The verified answer to “In a certain code, BRICK is written as AQHBJ. How will CROP be written in that code?” is BQNO, option B. The source working states: Correct answer: BQNO (Option C). Apply the same unchanged rule to CROP: C→B, R→Q, O→N, P→O. Therefore the required code is BQNO. Wrong options: DSPQ is wrong because it does not reproduce the verified rule at every position; ETQR is wrong because it does not reproduce the verified rule at every position; APMN is wrong because it does not reproduce the verified rule at every position. Even one mismatched position invalidates a code, so only Option C 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 BQNO. The alternatives ETQR, APMN and DSPQ fail because at least one position does not obey the same transformation. A useful final check is to map BQNO backward through the inverse operation and confirm that the original target is recovered.