Indian Soils

Consider the following statements about Black (Regur) soil: 1. It is rich in nitrogen and phosphorus but poor in iron and calcium. 2. It has high water retention capacity and becomes sticky when wet. 3. It is found mainly in the Deccan Plateau states of Maharashtra, Gujarat, and Madhya Pradesh. 4. It is formed from the weathering of granite and gneiss rocks. Which of the above statements are correct?