Polymers

Which of the following polymerises most easily?
Nylon-6 is not a 
Which among the following is a step growth polymer?
Materials and their properties are given in the table below.
Material CodeHeavyStrongOpaque
Conductor of heat/ electricity
FlexibleCan be moulded
MO1x$$\checkmark$$$$\checkmark$$x$$\checkmark$$$$\checkmark$$
MO2x$$\checkmark$$$$\checkmark$$$$\checkmark$$$$\checkmark$$x
MO3xxxxx$$\checkmark$$
MO4$$\checkmark$$$$\checkmark$$xxx$$\checkmark$$
MO5$$\checkmark$$$$\checkmark$$$$\checkmark$$xxx
MO6x$$\checkmark$$$$\checkmark$$xxx
Which of the following is not polyamide?