Which statement about the polymer PET is correct?

11.2.1.1. methane and ethane

11.2.1.2. ethene

11.2.1.3. ethanol

11.2.1.4. ethanoic acid

11.2.1.5. the products of the reactions stated in sections 11.4–11.7

11.2.2. State the type of compound present, given a chemical name ending in -ane, -ene, -ol, or -oic acid or from a molecular formula or displayed formula

11.2.3.1. alkanes

11.2.3.2. alkenes, including but-1-ene and but-2-ene

11.2.3.3. alcohols, including propan-1-ol, propan-2-ol, butan-1-ol and butan-2-ol

11.2.3.4. carboxylic acids containing up to four carbon atoms per molecule

11.2.4. Name and draw the displayed formulae of the unbranched esters which can be made from unbranched alcohols and carboxylic acids, each containing up to four carbon atoms