Read the following statements carefully and select the correct option. S1 :…

Fibres are classified as natural (from plants or animals, e.g., cotton, wool, silk) or man-made. A man-made fibre is produced by chemically treating a raw material into long, spinnable strands. At the school-science level, any fibre made this way — regardless of whether its starting raw material is a natural polymer such as wood-pulp cellulose or a purely mineral/petrochemical source — is classified as a synthetic (man-made) fibre.

Rayon, also known as artificial silk, is manufactured by chemically treating wood pulp (a natural source of cellulose) and forcing the resulting solution through fine holes to form continuous fibre strands. This chemical-treatment step is exactly what makes it a man-made/synthetic fibre, so S1 ("Rayon is a synthetic fibre") holds. However, wood pulp/cellulose is itself a natural raw material, so rayon's manufacture does depend on a natural raw material — S2 ("Rayon is made without using any natural raw material") does not hold. The pairing that fits is: S1 true, S2 false.

This is confirmed by contrast with nylon, the first fully synthetic fibre: nylon's fibre-forming polymer is built up from simple petrochemical monomers through a purely chemical synthesis reaction, without starting from any pre-existing natural polymer. Rayon, by contrast, starts from cellulose, a polymer that already exists naturally in wood pulp, which is only regenerated into fibre form by chemical treatment rather than built up from scratch. This is why rayon's manufacture depends on a natural raw material -- the pre-existing natural cellulose polymer -- in a way that nylon's does not.