Which of the following statements best contrasts the chemical and physical properties of North Bihar soils with South Bihar soils?

Options:

• A: North Bihar soils are predominantly acidic and rich in iron, while South Bihar soils are highly alkaline and rich in calcium.
• B: North Bihar soils are older alluvium with low water retention, while South Bihar soils are younger alluvium with high permeability.
• C: North Bihar soils are rich in nitrogen and phosphorus due to Himalayan rivers, while South Bihar soils are rich in organic humus.
• D: North Bihar soils generally have higher calcium carbonate (lime) content and neutral-to-alkaline pH, while South Bihar soils are older, more acidic-to-neutral, and rich in clay or iron-silicates.

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