The correct option is B Indigofera
Indigofera tintoria and I. suffruticose are the two plants belonging to the family Fabaceae that produce blue indigo dye. Fabaceae or Leguminosae family is also termed as pea family as it is comprised of legumes such as peas or beans.
Trifolium is commonly known as clover and is used as a traditional medicine for the remedy of asthma, whhoping cough, etc.
Lupine is used to make a variety of different sweet and savoury foods.
Cassia or cinnamon is commonly used as a spice in food preparation.