The correct option is C Euryale ferox
Euryale ferox is commonly known as makhana. It is the only extant species in the genus Euryale. It is a flowering plant classified in the water lily family, Nymphaeaceae, although it is occasionally regarded as a distinct family Euryalaceae. Unlike other water lilies, the pollen grains of Euryale have three nuclei. The seed is used in medicine and as food. Thus, the correct answer is option C.