See image — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{D}\). Classify the hydrocarbon by carbon framework and bond type: saturated alkanes, unsaturated alkenes/alkynes, or aromatic hydrocarbons. The selected option follows from that classification. Recovered question text: 68. Which of the following is most acidic ? (A) Methane (B) Ethane (C) Ethylene (D) Acetylene