Indian Geography
Which of the following is the largest oil refinery in India?

Panipat Refinery
Kochi Refinery
Jamnagar Refinery
Digboi Refinery

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Indian Geography
Which among the following steps are useful to prevent soil erosion?1. Afforestation2. Contour Ploughing3. Prohibition of shifting cultivation4. Flood controlChoose the correct option from the codes given below :

2 & 4
1, 2 & 4
1, 2, 3 & 4
1 & 2

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