Statement A: Sugarbeet, cabbage and carrots are monocarpic plants.
Statement B: Biennials require both cold treatment or vernalization and subsequent exposure to certain photoperiod for induction of flowering.
Sugar beet, carrot and cabbage are biennials which normally flower and die in the second season. These flower only once and hence moncarpic plants. In Biennials, flowering can be induced by subjecting the plant to cold treatment during vegetative growth and later exposing to certain photoperiod.