In the southern plains of Bihar, a specific type of heavy clayey alluvial soil locally known as 'Karail-Kewal' is found. Which of the following statements best describes its characteristics and agricultural utility?

Options:

• A: It is highly acidic, sandy soil with low water retention, suitable only for tea plantations.
• B: It is a heavy clayey soil, neutral to alkaline, with high moisture retention capacity, highly suitable for Rabi crops like wheat and pulses.
• C: It is a highly leached, lateritic soil found in the hilly tracts of Rajgir, suitable only for coarse grains.
• D: It is a newly deposited sandy-loam soil found exclusively in the floodplains of the Gandak river.

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