The correct option is C Liliaceae
Colchicum autumnale, commonly known as autumn crocus, meadow saffron or naked lady is a flower that resembles the true crocuses, but blooms in autumn.
The species is commonly cultivated as an ornamental in temperate areas, in spite of its toxicity. It belongs to family Liliaceae and not to Malvaceae, Cruciferae or Leguminosae.
Therefore, the correct answer is option C.