The correct option is B Poinsettia
Cyathium inflorescence found in Poinsettia. Cyathium inflorescence is characteristic of family Euphorbiaceae (e.g., Euphorbia and Poinsettia). The cyathia are sometimes solitary, but are usually in cymes, inflorescences of the second order, in pseudumbels, on dichotomously branched stalks or in so-called simple cymes which consist of one central and two lateral cyathia. One extremely reduced female flower standing in the centre at the base of the involucre, consisting of an ovary on a short stem with pistil and surrounded by five groups one group at the base of each bracteole of extremely reduced male flowers, which each consist of a single anther on a stem.
Therefore, the correct option is B.