Step 1: Understanding the Question:
We need to pick the crop from the list that is classed as a minor millet.
Step 2: Key Formula or Approach:
Millets are small seeded cereal grasses. They are grouped into major millets, like sorghum (jowar) and pearl millet (bajra), grown on a large area and used as staple grains, and minor millets, a group of smaller seeded millets grown on limited area, mainly in rainfed and hilly tracts.
Step 3: Detailed Explanation:
Foxtail millet (kangni, Setaria italica) belongs to the minor millet group, along with kodo millet, little millet, barnyard millet, finger millet and proso millet.
Buckwheat is not a true millet or even a true cereal grass. It belongs to the Polygonaceae family and is called a pseudocereal, grown mainly in hilly areas.
Sorghum (jowar) is a major millet grown widely as a staple cereal and fodder crop, so it is not classed as minor.
Barley is a true cereal of the grass family, grown in the rabi season, and is not a millet at all.
Step 4: Final Answer:
Foxtail millet is the correct choice as a minor millet, so option 1 is correct.