Step 1: Concept
Classification of polymers.
Step 2: Meaning
Identifying formation mechanisms (condensation vs. addition) and biodegradability.
Step 3: Analysis
Nylon 2,6 is a copolymer of glycine and aminocaproic acid, formed by condensation, and it is biodegradable. Other options misclassify the types (e.g., Nylon 6,6 is a copolymer).
Step 4: Conclusion
Nylon 2,6 is the correctly described polymer.
Final Answer: (B)