Which of the statements given are correct about the soils of India : 1. High temperature during most of the year retards formation of humus2. Soils which have humus require regular application of chemical fertilizers to remove nitrogen deficiency3. Titanium salts in basalt impart black, colour to the soils of the Indian plateau4. Red soils are confined to the peripheral areas of the Indian plateau

• A. 1 and 2
• B. 1, 3 and 4
• C. 2 and 3
• D. 2 and 4