The correct option is
A Poaceae
Poaceae or Gramineae is a large family of monocotyledonous flowering plants which are collectively referred to as grasses. It includes cereals, grasses of natural grasslands, bamboos. It is the most economically important plant family, providing staple foods from domesticated cereal crops such as maize, wheat, barley, millet. Millets are a group of highly variable small seed grasses which is widely grown worldwide as grains for human food and fodder.
So, the correct answer is 'Poaceae'