What is the national flower of England?

The national flower of England is the Tudor Rose, which is a symbol that has historical significance and represents the unification of the Houses of York and Lancaster after the Wars of the Roses in the 15th century. The Tudor Rose is often associated with the Tudor dynasty and is a prominent emblem in English history, culture, and heraldry. This flower is depicted as having both the white rose of York and the red rose of Lancaster, symbolizing peace and harmony between the two factions.

In contrast, the other choices do not hold the same national significance: the Sunflower, while popular, has no specific association with England; the Daffodil is often linked to Wales, where it is a national emblem; and the Lily, often associated with purity, doesn't have the same historical context linked to England specifically as the Tudor Rose does.