History · Industrial History of India
Which one among the following is the oldest oil refinery production unit in India?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Digboi Refinery✓
- 2Numaligarh Refinery
- 3Bongaigaon Refinery
- 4Guwahati Refinery
Correct answer
Digboi Refinery
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