The correct option is Rubber.
Explanation
Crops are classified based on their economic utility. Fibre crops are cultivated specifically for the production of fibres used in textiles, ropes, and paper. In contrast, plantation crops are grown on a large scale for commercial purposes, often involving the extraction of sap, latex, or fruits.
Option Analysis
- Rubber: This is not a fibre crop. Rubber is a plantation crop derived from the latex (milky fluid) of the Hevea brasiliensis tree. It is an industrial raw material used for manufacturing tires, tubes, and waterproofing materials.
- Cotton: This is a major fibre crop. The fibre is obtained from the seed coat (boll) of the cotton plant and serves as the primary raw material for the textile industry.
- Jute: Known as the "Golden Fibre," jute is a fibre crop obtained from the stem (bast fibre) of the plant. It is used to make gunny bags, mats, ropes, and carpets.
- Hemp: This is a fibre crop used industrially for producing durable ropes, canvas, paper, and textiles.
Key Takeaway: Cotton, Jute, and Hemp are natural fibre crops, whereas Rubber is a latex-based plantation crop.