State of Assam shares borders with how many other countries and Indian states respectively ? 

Which one of the following is the northernmost river basin of the Deccan Plateau ? 

Laterite soil in India is rich in which of the following ?

1. Calcium

2. Nitrogen

3. Phosphate

4. Potash

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Which of the following statements with reference to crops cultivated in India is/are correct ?

1. Bajra grows well in sandy and shallow black soils, whereas red and shallow black soil is suited for Ragi

2. Bajra is predominantly grown in states like Rajasthan, Uttar Pradesh and Maharashtra, while Ragi is mainly cultivated in Karnataka, Tamil Nadu and Himachal Pradesh

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