The correct answer is: a) Millets and pulses.
Dryland farming is a type of agriculture that is practiced in areas with low rainfall. It is a challenging type of farming, as it requires farmers to be able to manage their water resources carefully. Millets and pulses are two types of crops that are well-suited to dryland farming. They are both drought-tolerant and can grow in poor soils. Millets are a type of cereal grain that is grown in many parts of the world. They are a good source of carbohydrates and protein. Pulses are a type of legume that is also grown in many parts of the world. They are a good source of protein and fiber.
Sugarcane is a type of grass that is grown for its sugar content. It is a water-intensive crop and requires a lot of rainfall to grow. Rice is a type of grass that is grown for its grain. It is also a water-intensive crop and requires a lot of rainfall to grow. Coffee is a type of shrub that is grown for its beans. It is a tropical crop and requires a lot of rainfall to grow.
In conclusion, dryland farming in interior Tamil Nadu often focuses on millets and pulses. These crops are well-suited to the dry climate and low rainfall of the region.