Answer: Option (d) is the correct answer.
Explanation:
A basic unit of a polymer is called a monomer. And when number of monomer units combine together then it results in the formation of a polymer.
As poly means "many" and mer means "units". So when many units combine together then they form a polymer. These units are repetitive in nature.
Thus, we can conclude that it can be known about all four polymers, despite their differences that they are made of repeating sub-units.
