Which is the Asia's largest and freshwater oxbow lake in Bihar?
Detailed Explanation:
Kanwar Lake in Begusarai district, Bihar, is Asia's largest freshwater oxbow lake, covering 2,620 hectares. It is Bihar's only Ramsar wetland site (designated 21-07-2020) and serves as a critical stopover for migratory birds on the Central Asian Flyway.
An oxbow lake forms when a river meander is cut off, creating a crescent-shaped water body. Kanwar Lake supports 165 plant species and 394 animal species, including 221 bird species, making it ecologically significant.
Therefore, Kanwar Lake is the correct answer, making Option 1 correct.
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