question: river length:river inspection:clear water and green shore
choices.label: A B C D
choices.text: lake chief:pollution control:calm waves road length:road maintenance:traffic captain:airliner pilot:safe and on time village chief:take the lead and get rich:birds' twitter and fragrance of flowers
explanation: the job responsibilities of the "river chief" are "river inspection", and "clear water and green banks" is the purpose of the "river chief". the job responsibility of the "lake chief" is "pollution control", but "calm waves" is not the purpose of the work of the "lake chief". the duty of the "road chief" is to take overall responsibility for the road section under its jurisdiction, and the duty of the "road chief" is not "road maintenance". the job responsibility of the "captain" is to "pilot the airliner", and the mission of the "captain" is to be "safe and punctual". the duty of the "village chief" is to lead the villagers to become rich together. the duty of the "village chief" is not to "take the lead in getting rich", and the goal to be achieved is not to "birds' twitter and fragrance of flowers", and is logically inconsistent with the query.
relation: river length river inspection clear water and green shore R3.10
relation: lake chief pollution control R3.10
relation: road length road maintenance R3.10
relation: captain airliner pilot safe and on time R3.10