The correct option is A Gramineae
Gramineae is one of the largest families in monocots consisting of 620 genera and about 6000 species with around 900 species are present in India. Leguminosae is one of the largest families in dicots, including about 690 genera and nearly 18,000 species. Orchidaceae has 26,049 currently accepted species, found in 880 genera. Solanaceae has 90 genera and 2000 species. The correct answer is A.