Consider the following statements regarding the spatial distribution of rainfall in Bihar: 1. The average annual rainfall in Bihar decreases progressively from east to west and from north to south. 2. Kishanganj district in northeast Bihar receives the highest average annual rainfall in the state. 3. The southern plains of Bihar receive higher rainfall than the northern plains due to the proximity of the Chota Nagpur plateau. Which of the statements given above are correct?
Options:
- A: 1 and 3 only
- B: 1 and 2 only
- C: 2 and 3 only
- D: 1, 2 and 3
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