No other river in Bangladesh is as swift as the Karnafuli. (it Superlative)

• ক The Karnafuli was swiftest river in Bangladesh.
• খ No other river was as swiftest as the Karnafuli.
• গ The Karnafuli is the swiftest river in Bangladesh. ✅ সঠিক উত্তর
• ঘ The Karnafuli is one of the swiftest river in Bangladesh.