Explanation:

- Rayon is a semi-synthetic fiber made from cellulose. It is derived from natural sources like wood pulp, making it a cellulosic fiber.

- Linen is a natural textile made from the fibers of the flax plant. It is also a cellulosic fiber due to its plant origin.

- Jute is a natural fiber harvested from the jute plant and is considered a cellulosic fiber.

- Nylon is a fully synthetic fiber made from petrochemicals and does not contain cellulose. Therefore, it is non-cellulosic.

Correct Answer: Option 4, Nylon.

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