The correct option is C Wheat
The reaction of the length of day and night on the flowering of the plants is known as photoperiodism. Angiosperms make use of a photoreceptor protein such as phytochrome to sense the changes. According to their response, plants are classified as long day plants which flowers when night length is below the critical photoperiod( eg: Wheat, carnation, Oats, Barley) short day plants ( Cotton, rice , Soybeans)