Consider the following statements regarding Agroclimatic Zone 2 (North-East Alluvial Zone) of Bihar: I. Its geographical coverage encompasses districts such as Darbhanga, Supaul, Araria, Kishanganj, Purnia, and Katihar. II. The environmental and climatic profile of this zone is distinctly characterized by high humidity, persistent waterlogging, and frequent floods. III. It represents an irrigated region experiencing low rainfall, dominated by highly fertile old alluvium. IV. The zone is characterized by undulating terrain and red or laterite soils, making it less fertile and suitable primarily for coarse cereals. Which of the statements given above are correct?

Consider the following statements regarding Agroclimatic Zone 5 (Southern Plateau) of Bihar: I. Its geographical coverage encompasses the southern districts of Gaya and Nawada. II. The agricultural landscape is primarily dominated by the cultivation of coarse cereals, pulses, and oilseeds. III. It is distinguished by its undulating terrain combined with red and laterite soils, rendering it overall less fertile. IV. The region functions as a transitional area between alluvial and plateau soils, characterized by high humidity and frequent floods. Which of the statements given above are correct?

Consider the following statements regarding the South-Western Alluvial Zone (Agroclimatic Zone 4) of Bihar: 1. The geographical coverage of this zone incorporates districts such as Rohtas, Kaimur, Aurangabad, Jehanabad, and Arwal. 2. The agricultural landscape is structurally supported by the presence of fertile old alluvium. 3. It relies heavily on natural high rainfall and persistent waterlogging, eliminating the necessity for artificial irrigation. 4. The region is widely recognized for cultivating major crops like wheat, pulses, vegetables, and oilseeds. Which of the statements given above are correct?