Red soil is primarily found in India in the Eastern and Southern part of the Deccan Plateau, which includes states like Odisha, Chhattisgarh, Jharkhand, Karnataka, and parts of Andhra Pradesh and Tamil Nadu. This type of soil gets its characteristic red color from the presence of iron oxide. Red soils are well-drained and porous, making them suitable for cultivation. They are rich in minerals and nutrients, but they are also susceptible to erosion. Option 1, stating that red soil is found only in the Eastern region, is incorrect as it does not account for the Southern part of the Deccan Plateau. Similarly, option 2, stating that red soil is found only in the Southern region, is also incorrect as it does not consider the Eastern part of the Deccan Plateau. Option 4, stating that red soil is found in none of these regions, is completely incorrect.