The correct option is
C Gramineae
Rice belongs to the genus Oryza, of the tribe Oryzeae, of the subfamily Bambusoideae or Ehrhartoideae, of the family Poaceae or Gramineae.
Oryza sativa (rice) is the staple food for 2.5 billion people. It is the grain with the second highest worldwide production after
Zea mays.
So, the correct answer is 'Gramineae'