A technician compares records from four investigations.
| Record | Observation |
|---|---|
| K | A large number of alkene monomers formed one long-chain molecule. No other substance formed. |
| L | Amino acid molecules formed a long chain, and water was produced. |
| M | Ethanediol and hexanedioic acid formed a long chain, and water was produced. |
| N | Two chains containing nucleotide monomers coiled around each other. |
Which record describes addition polymerisation?
Record L
Record N
Record K
Record M