plains

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Across
  1. 2. A branch of the river ganga which flows through the city of Kolkata
  2. 5. It is the fertile and finely graded soil
  3. 6. Area watered by a river and its tributaries
Down
  1. 1. the meeting point of the rivers Ganga and yamuna at Prayagraj
  2. 3. The name by which the river brahmautra is known in tibet
  3. 4. A land of five rivers