The correct option is
B Flower in all possible photoperiods
Short day plants are those plants that begin flowering when the days are shorter than their critical day length. They require the long period of darkness and the short period of light to flower. Long day plants are those plants that begin flowering when the days are longer than their critical day length. They will flower when they are exposed to the short period of darkness and the long period of light. Day neutral plants do not depend upon the amount of darkness or daylight hours for flowering. They flower independent of day length. Examples of day neutral plants are sunflower and tomato. Thus, the correct answer is option B.