The synthetic fibre A is chemically a polyamide whereas the synthetic fibre B contains a large number of ester groups. Another synthetic fibre C is made of a polymer D which consists of a number of glucose units joined one after the other. A) Which fibre could be i) terylene ii) rayon, and iii) nylon? B) Name the polymer D. C) Which fibre (A, B or C) is prepared from a natural raw material? D) Which fibre (A, B or C) contains the same type of groups as those in a PET jar?