The first oil refinery in India was set up at

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Detailed Solution

The first oil refinery in India was set up at Digboi.
The Assam oil company built the first refinery in Digboi in 1901, not long after discovering oil reserves there. Since then, Digboi has become renowned as India's oil city and is regarded as the cradle of the Indian oil industry. It is well-known for two reasons: first, it is an active 100-year-old oilfield, and second, it is the world's oldest operational oil refinery.

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