The correct options are
A It is a co-polymer
B It is a condensation polymer
C It is a polyester
a) Copolymers are those which are formed from two or more different monomers. The monomers of terylene are terephthalic acid and ethylene glycol. So, it is a copolymer.
b) It is a condensation polymer as during polymerization, water molecules is removed.
c) Polyesters are a class of polymers which contain ester groups in their main chain. So, terylene is a polyester.
d) The monomers of terylene are terephthalic acid and ethane-1,2-diol.