Digboi oil refinery is an example of which type of refinery?
Answer & explanation
Correct answer: option 1
The correct answer is Option 1: Field based
NCERT: Oil extracted from the wells is crude oil and contains many impurities. It cannot be used directly. It needs to be refined. There are two types of refineries in India: (a) field-based and (b) market-based. Digboi is an example of field-based and Barauni is an example of market-based refinery.