Pick the climacteric vegetable.

Climacteric fruits and vegetables are the fruits that will be ripe after being picked up. It can also be defined as the stage of fruit ripening with increased ethylene production as the increase of respiration in cells.
Some examples of such fruits and vegetables are Apples, bananas, melons, apricots and tomatoes.
Muskmelon is also a climacteric vegetable among the given options.