Esterification of carboxylic acid with alcohol

Steps:

• Identify compound Z as a carboxylic acid based on typical reactions with alcohols.
• Recognize the reaction as esterification, where acid + alcohol → ester + water.
• Determine products: ester (from Z and propan-1-ol) and water.
• Note skeletal formulae apply only to the organic ester product (T), as water lacks one.

Why D is correct:

• Esterification yields one organic product with a skeletal formula (T), per the reaction mechanism.

Why the others are wrong:

• A includes S (likely incorrect ester) and T.
• B includes U (likely alcohol or acid, not product).
• C includes S (wrong structure) and U (irrelevant).

Final answer: D