The correct option is B Megasporophylls
Carpel is the female reproductive organ that contains ovules in flowering plants or angiosperms and mega sporophylls is a sporophyte that contains mega sporangium. A carpel is composed of an ovary, a style, and a stigma, although some flowers have carpels without a distinct style.
In origin, carpels are leaves (megasporophylls) that have evolved to enclose the ovules.The carpel is a single megasporophyll, or modified seed-bearing leaf.