The correct options are
A Nylon-6 has a cyclic monomer
C Nylon-6,6 is a condensation polymer
D Monomers of nylon-6,6 are hexamethylene diamine and adipic acid
a) The monomer of nylon-6 is caprolactam. So nylon-6 has cyclic a monomer.
b) An elastomer has both elasticity and viscosity and has weak intermolecular forces.
c) Nylon-6,6 is a condensation polymer. Condensation takes place with the loss of water molecules.
d) Monomers of nylon-6,6 are hexamethylene diamine and adipic acid