One of the following man-made fibre is not preparedfrom raw materials obtained from petrochemicals This oneis:(a) polyester (b) nylon(c) rayon (d) acrylic

To determine which man-made fiber is not prepared from raw materials obtained from petrochemicals, we need to analyze each option.

(a) Polyester: Polyester is a synthetic fiber that is commonly derived from petrochemicals. Therefore, it is prepared from raw materials obtained from petrochemicals.

(b) Nylon: Nylon is also a synthetic fiber that is typically derived from petrochemicals. Therefore, it is prepared from raw materials obtained from petrochemicals.

(c) Rayon: Rayon is a semi-synthetic fiber that is made from cellulose, which can be obtained from various sources such as wood pulp or cotton. While some rayon production processes may involve the use of petrochemicals, it is not exclusively prepared from raw materials obtained from petrochemicals.

(d) Acrylic: Acrylic is a synthetic fiber that is derived from petrochemicals. Therefore, it is prepared from raw materials obtained from petrochemicals.

Based on the analysis, the man-made fiber that is not prepared from raw materials obtained from petrochemicals is (c) rayon.