Which one of the following substance is made from natural raw materials? |
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(a) |
Rayon |
(b) |
Nylon |
|
(c) |
Polyester |
(d) |
Polystyrene |
Which one of the following substance is made from natural raw materials? |
|
|||
(a) |
Rayon |
(b) |
Nylon |
|
(c) |
Polyester |
(d) |
Polystyrene |