Correct Option
The correct option is (a).
Explanation
Cotton is a natural plant fibre composed primarily of cellulose. It is a major cash crop that requires specific climatic conditions and soil types, predominantly found in tropical and subtropical regions.
Statement-wise Analysis
- Statement 1 is Correct: Cotton plants are best grown in black soil (also known as Regur soil). This soil type, found extensively in the Deccan Plateau, has excellent moisture-retention capacity and is rich in nutrients like calcium carbonate and potash, making it ideal for cotton cultivation.
- Statement 2 is Incorrect: Cotton requires a warm climate for growth, typically with temperatures ranging between 21°C and 30°C. It specifically requires at least 210 frost-free days. A cold climate is unsuitable and detrimental to the crop.
- Statement 3 is Incorrect: The fruit of the cotton plant is technically referred to as the cotton boll. The cotton seeds are located inside the boll. When the boll matures, it bursts open to reveal the soft cotton fibres covering the seeds.
Key Takeaway: Cotton cultivation requires black (Regur) soil and a warm climate with frost-free days. The fibre is obtained from the fruit of the plant, known as the cotton boll.