The black cotton soil of India has been formed due to the weathering of

Black cotton soil, also known as Regur soil, is formed from the weathering of basaltic lava rocks originated during fissure volcanic eruptions in the Deccan Trap region. Option (C) is the most common distractor, but granite and schist are the parent materials for Red Soil, which lacks the high clay content and moisture retention characteristic of black soil. This question tests the core concept of pedogenesis (soil formation) and the specific relationship between parent rock material and soil types in India.