Rayon or artificial silk is obtained from

Options

A. cocoon
B. petroleum
C. silk fibre
D. wood pulp.

Explanation

**Step-by-Step Solution:**

1. **Understanding Rayon:** Rayon is a type of fiber that is often referred to as artificial silk due to its silky appearance and texture.

2. **Sources of Rayon:** To determine the source of rayon, we need to examine potential materials from which it can be derived. The options provided include cocoon, petroleum, and wood pulp.

3. **Cocoon:** Cocoon is primarily associated with silk production. It is made from the larvae of silkworms, particularly the mulberry silkworm. While silk is derived from cocoons, rayon is not obtained from this source.

4. **Petroleum:** Petroleum is a natural resource used mainly for fuel and the production of various chemicals and plastics. It does not directly yield rayon or artificial silk.

5. **Wood Pulp:** Wood pulp is derived from trees and is used in the production of various paper products. When wood pulp is chemically treated, it can be dissolved to create a new type of fiber known as regenerated fiber.

6. **Conclusion:** The regenerated fiber obtained from wood pulp is what we refer to as rayon or artificial silk. Therefore, rayon is obtained from wood pulp.

**Final Answer:** Rayon or artificial silk is obtained from wood pulp.

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