The correct option is C Pennisetum glaucum
Pearl millet or bajra (Pennisetum glaucum) is the most widely grown type of millet. It has been grown in Africa and the Indian subcontinent since prehistoric times. The centre of diversity and suggested area of domestication for the crop is in the Sahel zone of West Africa. Because of its tolerance to difficult growing conditions, it can be grown in areas, where other cereal crops, such as maize or wheat, would not survive. Thus, the correct answer is option B.