See image — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{C}\). 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: 6. Which of the following will have least hindered rotation about carbon-carbon bond? (A) Ethane (B) Ethylene (C) Acetylene (D) Hexachloroethane