See image — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{A}\). Preparation methods are selected by the target hydrocarbon: elimination forms alkenes/alkynes, reduction gives more saturated products, and coupling reactions build larger carbon skeletons. Recovered question text: 24. An unknown carboxylic acid salt on Kolbe’s electrolysis forms cyclobutane. The carboxylic acid is (A) hexanedionic acid (B) hexanoic acid (C)butanoic acid (D) transbutenedioic acid