The correct option is:**(d) inflorescence and flower characters.**
Explanation:
The Family Leguminosae (Fabaceae) comprises 3 sub families Papilionoideae (Faboideae). Caesalpinioideae and Mimosoideae. These are distinguished mainly on the basis of inflorescence and floral characters mostly corolla and androecium. Papilionoideae is characterised by papilionaceous corolla (butterfly shaped), flowers, zygomorphic and diadelphous condition of stamens. Caesalpinioideae has zygomorphic flowers, ascending imbricate corolla and 10 stamens (diplostemonous condition). Mimosoideae shows actinomorphic flowers with indefinite exerted stamens.
